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Videos uploaded by user “SciShow” for the 2017
The Strongest Bases in the World
 
04:29
Acids are widely considered to be the scariest chemical compounds of all, but bases can be just as powerful. Most powerful of all are a special class of pH scale-defying bases called superbases! Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.chemistryexplained.com/Ru-Sp/Soap.html http://www.classzone.com/vpg_ebooks/ml_sci_gr8/accessibility/ml_sci_gr8/page_324.pdf http://pubs.rsc.org/en/content/articlehtml/2016/sc/c6sc01726f http://chemistry.anu.edu.au/news-events/basically-record-breaking http://media.uow.edu.au/news/UOW219367.html http://pubs.rsc.org/en/Content/ArticleLanding/2016/SC/C6SC01726F#!divAbstract http://www.bioworldusa.com/ph/household-bleach# http://www.softschools.com/formulas/chemistry/sodium_hydride_uses_properties_structure_formula/248/ http://rushim.ru/books/mechanizms/superbases-for-organic-synthesis.pdf http://www.chemistryviews.org/details/ezine/8095451/The_Strongest_Superbases.html http://fileserver.net-texts.com/asset.aspx?dl=no&id=155824 http://www.ks.uiuc.edu/Training/SumSchool/materials/sources/tutorials/05-qm-tutorial/part2.html
Views: 1013353 SciShow
What Happens If You Don't Take out a Splinter?
 
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Splinters are gross, but you might want to watch this before grabbing the tweezers. Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.aafp.org/afp/2003/0615/p2557.html#afp20030615p2557-b14 http://www.cofirstaid.org/files/splinter-removal.pdf http://www.aafp.org/afp/2007/0901/p683.html http://www.the-dermatologist.com/content/treating-rare-fungal-infections-sporotrichosis https://www.cdc.gov/tetanus/about/causes-transmission.html https://www.hindawi.com/journals/crior/2012/439836/ http://woundcaresociety.org/why-does-rusty-metal-cause-tetanus https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4082545/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2032357/?page=9,
Views: 3035477 SciShow
How Would We Stop a Nuclear Missile?
 
05:04
Most of us are hoping that any nuclear threats are just empty threats, and getting at the facts about ICBMs can be difficult. But what would actually happen if someone launched a nuclear weapon? We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Inerri, D.A. Noe, Charles Southerland, Fatima Iqbal, سلطان الخليفي, Nicholas Smith, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://dailycaller.com/2017/02/14/pentagon-us-ready-to-blast-north-koreas-new-missile-out-of-the-sky/ https://fas.org/nuke/intro/missile/icbm.htm http://www.businessinsider.com/north-korean-nuclear-strike-united-states-arrival-times-2017-8 http://science.howstuffworks.com/nuclear-bomb7.htm http://science.howstuffworks.com/missile-defense1.htm https://www.space.com/19601-how-intercontinental-ballistic-missiles-work-infographic.html http://science.howstuffworks.com/difference-ballistic-cruise-missile.htm https://www.nbcnews.com/news/world/u-s-spy-planes-watching-possible-north-korea-nuke-test-n749111 https://arstechnica.com/tech-policy/2014/07/how-us-satellites-pinpointed-source-of-missile-that-shot-down-airliner/ http://www.koreatimes.co.kr/www/news/nation/2016/11/205_217259.html http://www.cnn.com/2017/02/14/politics/us-north-korea-aegis-ballistic-missile-defense/index.html https://www3.epa.gov/radtown/fallout-nuclear-weapons-testing.html http://spacenews.com/la%E2%80%82pleading-missile-warning-satellites-track-wildfires/ http://nationalinterest.org/blog/the-buzz/what-would-happen-if-north-korea-fired-nuclear-weapon-20205 https://www.quora.com/How-many-steps-are-required-to-arm-and-trigger-an-aircraft-fired-missile-and-what-safeguards-are-there-to-prevent-accidents https://www.quora.com/What-would-happen-if-a-plane-carrying-a-nuclear-bomb-would-crash-e-g-by-being-shot-down-but-without-the-rocket-hitting-the-actual-bomb-Would-the-bomb-explode-by-the-force-of-the-collision http://www.businessinsider.com/nuclear-bomb-accident-goldsboro-nc-swamp-2017-5 http://www.nytimes.com/1981/05/26/us/us-discloses-accidents-involving-nuclear-weapons.html http://www.airspacemag.com/military-aviation/can-we-stop-a-nuke-16988105/ https://www.mda.mil/system/gmd.html https://www.theatlantic.com/technology/archive/2017/01/north-korea-nuclear-missiles/512240/ https://www.theatlantic.com/magazine/archive/1988/04/the-rush-to-deploy-sdi/308326/ http://www.popsci.com/article/technology/could-lasers-be-future-anti-missile-weapons http://breakingdefense.com/2014/05/the-limits-of-lasers-missile-defense-at-speed-of-light/ http://breakingdefense.com/2015/08/return-of-the-abl-missile-defense-agency-works-on-laser-drone/ Images: https://commons.wikimedia.org/wiki/File:Dauntless_bomb_drop.jpg https://en.wikipedia.org/wiki/File:Trident_II_missile_image.jpg https://en.wikipedia.org/wiki/File:Tomahawk_Block_IV_cruise_missile.jpg https://commons.wikimedia.org/wiki/File:Goldsboro_Mk_39_Bomb_1-close-up.jpeg https://commons.wikimedia.org/wiki/File:%E3%81%9D%E3%81%86%E3%82%8A%E3%82%85%E3%81%86%E5%9E%8B%E6%BD%9C%E6%B0%B4%E8%89%A6.jpg https://en.wikipedia.org/wiki/File:YAL-1A_Airborne_Laser_unstowed_crop.jpg https://en.wikipedia.org/wiki/File:Military_laser_experiment.jpg
Views: 713365 SciShow
What Makes Your Hair Curl?
 
02:30
We all have really different looking locks but what actually make our hair straight or curly? Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Jeremy Peng, Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Saul, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.popsci.com/science/article/2012-11/fyi-what-maks-hair-curly https://www.ncbi.nlm.nih.gov/pubmed/17919197 http://onlinelibrary.wiley.com/doi/10.1111/j.1365-4632.2007.03453.x/abstract http://www.telegraph.co.uk/news/science/science-news/6751910/Curly-hair-gene-discovered-by-scientists.html https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2775823/ http://www.nature.com/articles/ncomms10815 http://wonderopolis.org/wonder/how-does-heat-both-straighten-and-curl-hair https://www.scienceabc.com/innovation/what-is-the-science-behind-hair-straightenerscurlers.html http://www.smithsonianmag.com/science-nature/why-humidity-makes-your-hair-curl-21127724/ http://www.yalescientific.org/2010/04/everyday-qa-how-does-a-perm-work/ Images: https://commons.wikimedia.org/wiki/File%3AHierarchical_structure_of_hair_in_the_cortex_and_cuticle.png https://commons.wikimedia.org/wiki/File%3ACurling_iron_CISC-W2W32_by_Create_Co.%2C_Ltd._(2015-09-20).JPG
Views: 282539 SciShow
Viroids: Possibly the Smallest Pathogens on Earth
 
04:14
Potato spindle tuber disease wasn't a life-or-death situation, but it led to the discovery of viroids: infectious, replicating bits of RNA Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—Alexander Wadsworth, Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.ars.usda.gov/oc/timeline/viroid/ https://agresearchmag.ars.usda.gov/1999/dec/boon http://www.apsnet.org/publications/apsnetfeatures/Pages/Viroids.aspx https://www.ncbi.nlm.nih.gov/pubmed/25455904 http://www.els.net/WileyCDA/ElsArticle/refId-a0000434.html http://journal.frontiersin.org/article/10.3389/fmicb.2016.01552/full https://medlineplus.gov/ency/article/000216.htm http://www.sciencedirect.com/science/article/pii/S0168827809000592 https://biologydirect.biomedcentral.com/articles/10.1186/s13062-016-0116-7 http://www.pnas.org/content/86/23/9370.full.pdf http://exploringorigins.org/ribozymes.html http://mcmanuslab.ucsf.edu/node/246 https://www.nature.com/nrmicro/journal/v1/n1/full/nrmicro736.html http://www.sciencedirect.com/science/article/pii/0042682271903424?via%3Dihub https://www.apsnet.org/publications/PlantDisease/BackIssues/Documents/1984Articles/PlantDisease68n01_4.pdf
Views: 365204 SciShow
Why Do We Eat Raw Fish But Not Raw Chicken?
 
02:44
We might order fish raw, but why don't we ever order chicken that way? Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://time.com/3731226/you-asked-why-cant-i-eat-raw-meat/ https://www.cdc.gov/parasites/anisakiasis/faqs.html http://www.fda.gov/downloads/Food/GuidanceRegulation/UCM252393.pdf https://www.ncbi.nlm.nih.gov/pubmed/19842365 http://www.nmfs.noaa.gov/aquaculture/faqs/faq_seafood_health.html https://www.cdc.gov/salmonella/general/ https://www.cdc.gov/foodsafety/diseases/campylobacter/index.html http://umash.umn.edu/wp-content/uploads/2015/11/Campylobacter-MDH.pdf https://medlineplus.gov/ency/article/000631.htm
Views: 994044 SciShow
Why Do I Have Tonsil Stones?
 
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If you found the whiteish-yellowish lump on your throat, that might be a tonsil stone. But where does the lump come from? Why do you have it? Hosted by: Michael Aranda Want more SciShow in person? We'll be at NerdCon: Nerdfighteria in Boston on February 25th and 26th! For more information, go to http://www.nerdconnerdfighteria.com/ ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Jeremy Peng, Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Saul, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.nytimes.com/2009/09/01/health/01tons.html https://www.ncbi.nlm.nih.gov/pubmed/17372553 http://www.sciencedirect.com/science/article/pii/S1286457906002280 http://scienceline.ucsb.edu/getkey.php?key=3273 http://www.livescience.com/26983-lymphatic-system.html http://medcell.med.yale.edu/histology/immune_system_lab/palatine_tonsil.php https://www.ncbi.nlm.nih.gov/pubmed/19716006 Image Sources: https://commons.wikimedia.org/wiki/File:Tonsillolith_in_mouth.jpg https://commons.wikimedia.org/wiki/File:Throat_with_Tonsils_0012J.jpeg
Views: 765874 SciShow
Can You Learn Perfect Pitch?
 
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Some people can identify a pitch without even looking at sheet music. Is it something they're born with or can it be learned? Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin, Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.sciencedirect.com/science/article/pii/S0010027715000621 https://www.researchgate.net/publication/41194498_Learning_the_Special_Note_Evidence_for_a_Critical_Period_for_Absolute_Pitch_Acquisition https://www.sciencedaily.com/releases/2015/05/150528123917.htm https://news.uchicago.edu/article/2015/05/28/acquiring-perfect-pitch-may-be-possible-some-adults https://www.ncbi.nlm.nih.gov/books/NBK11007/ http://www.apa.org/monitor/feb05/pitch.aspx http://asa.scitation.org/doi/10.1121/1.4808626 ---------- Images: https://commons.wikimedia.org/wiki/File:Mozart-small.jpg https://commons.wikimedia.org/wiki/File:Hands-music-musician-piano_(23958938169).jpg
Views: 271000 SciShow
How Can It Be Too Hot To Fly?
 
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How does heat affect airplanes? Turns out heat, speed and density connect to create dangerous situations. Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, D.A. Noe, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Nicholas Smith, Tim Curwick, Alexander Wadsworth, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.nytimes.com/2017/06/20/business/flying-climate-change.html https://www.wired.com/story/phoenix-flights-canceled-heat/ https://www.grc.nasa.gov/www/k-12/airplane/newton3.html https://www.youtube.com/watch?v=aFO4PBolwFg http://www.telegraph.co.uk/travel/travel-truths/why-planes-too-hot-to-fly-heat-aircraft/ https://aviation.stackexchange.com/questions/1531/does-temperature-affect-takeoff-performance http://www.telegraph.co.uk/news/science/science-news/9035708/Cambridge-scientist-debunks-flying-myth.html http://iopscience.iop.org/article/10.1088/0031-9120/38/6/001/pdf https://www.flydenver.com/about/press_kit/runways_airfield Images: https://commons.wikimedia.org/wiki/File:Phoenix_(4270737598).jpg https://commons.wikimedia.org/wiki/File:Runway_8_26_markings,_DEN.jpg https://commons.wikimedia.org/wiki/File:DEN_airport_jpg.jpg
Views: 400982 SciShow
How a Sick Chimp Led to a Global Pandemic: The Rise of HIV
 
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In the first video in our two part series on HIV and AIDS, we explain how scientists figured out what HIV is, when the infection morphs into AIDS, and where they think the virus originated. We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: KSam Lutfi, Kevin Knupp, Nicholas Smith, Inerri, D.A. Noe, alexander wadsworth, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick Merrithew, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Fatima Iqbal, Justin Lentz ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.avert.org/professionals/history-hiv-aids/overview https://aidsinfo.nih.gov/ https://www.hiv.gov/hiv-basics/overview/about-hiv-and-aids/what-are-hiv-and-aids https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3119211/ https://www.hiv.gov/hiv-basics/overview/history/hiv-and-aids-timeline https://hab.hrsa.gov/livinghistory/issues/Gay-Men.pdf https://www.cdc.gov/mmwr/preview/mmwrhtml/june_5.htm http://img.thebody.com/cdc/pdfs/mmwr04jul81.pdf http://science.sciencemag.org/content/224/4648/500 https://www. hingtonpost.com/news/to-your-health/wp/2015/02/24/tracing-the-long-convoluted-history-of-the-aids-epidemic\ http://www.iflscience.com/health-and-medicine/where-did-hiv-come/ http://www.stat.wisc.edu/~larget/Genetics629/hiv.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3234451/ http://www.who.int/gho/hiv/en/ https://www.cdc.gov/mmwr/preview/mmwrhtml/su6004a11.htm http://www.aidsmap.com/Saliva/page/1322841/ https://www.ncbi.nlm.nih.gov/pubmed/9989543 http://www.usp.br/nepaidsabia/images/BIBLIOTECA/_MIGRAR/oralhivtrans.pdf https://www.cdc.gov/mmwr/preview/mmwrhtml/00001257.htm https://www.nobelprize.org/nobel_prizes/medicine/laureates/2008/press.html https://www.hiv.lanl.gov/content/sequence/HelpDocs/subtypes-more.html http://www.the-scientist.com/?articles.view/articleNo/47352/title/HIV-Spread-from-Haiti-to-NYC-in-1970---Patient-Zero--Not-to-Blame/ http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0025956 https://retrovirology.biomedcentral.com/articles/10.1186/1742-4690-6-49 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC393899/ http://bedford.io/pdfs/papers/faria-hiv-spread.pdf ---------- Images: https://commons.wikimedia.org/wiki/File:Aids_Quilt.jpg https://commons.wikimedia.org/wiki/File:Hiv_gross.png https://en.wikipedia.org/wiki/T_cell#/media/File:Healthy_Human_T_Cell.jpg https://commons.wikimedia.org/wiki/File:Pneumocystisjiroveci.jpg https://en.wikipedia.org/wiki/Pneumocystis_pneumonia#/media/File:PCPxray.jpg
Views: 928556 SciShow
Are Modern Humans Really Older Than We Thought?
 
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Until recently, fossil evidence for modern humans has only gone back 200,000 years. A new discovery in Morocco and thermoluminescence dating may help extend that beyond 300,000 years. Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shoutout to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.nature.com/news/oldest-homo-sapiens-fossil-claim-rewrites-our-species-history-1.22114 https://www.nature.com/nature/journal/v546/n7657/full/546212a.html https://www.nature.com/nature/journal/v546/n7657/full/nature22336.html https://www.nature.com/nature/journal/v546/n7657/full/nature22335.html http://www.nature.com/news/oldest-ancient-human-dna-details-dawn-of-neanderthals-1.19557 https://www.nature.com/nature/journal/v531/n7595/full/nature17405.html http://anthro.palomar.edu/homo2/mod_homo_4.htm https://www.ncbi.nlm.nih.gov/pubmed/22658331 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0024024 http://anthro.palomar.edu/homo2/mod_homo_5.htm https://www.thoughtco.com/luminescence-dating-cosmic-method-171538 ---------- Images: https://commons.wikimedia.org/wiki/File:CIA_WorldFactBook-Political_world.pdf https://www.flickr.com/photos/ideonexus/4698383548/in/photolist-8a8diF-8abrJU-8abt2f https://commons.wikimedia.org/wiki/File:Crane1.png https://commons.wikimedia.org/wiki/File:Sahara_dust_plume_Nov_1998.jpg
Views: 290054 SciShow
How Does Icing an Injury Help?
 
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SciShow is nominated for a Webby! Vote for us! https://vote.webbyawards.com/PublicVoting#/2017/film-video/video-channels-and-networks/science-education-channels-and-networks Since your body is already pretty good at healing itself, does icing an injury actually help? Hosted by: Hank Green Why Are Paper Cuts So Painful: https://www.youtube.com/watch?v=sK4b-m00OlQ ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://emj.bmj.com.proxy.libraries.rutgers.edu/content/25/2/65.full http://journals.sagepub.com/doi/pdf/10.1177/0363546503260757 http://www.webmd.com/arthritis/about-inflammation#2 http://www.sportsinjurybulletin.com/archive/1066-cryotherapy.htm# http://emj.bmj.com.proxy.libraries.rutgers.edu/content/25/2/65.full#ref-20 http://www.sportsinjurybulletin.com/archive/1066-cryotherapy.htm# http://bjsm.bmj.com/content/41/6/365 http://www.nature.com/articles/srep18525 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2290674/
Views: 254859 SciShow
Why Do We Get Colds When It's Cold?
 
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The temperature drops and you're more likely to get a cold: Is this correlation or causation? We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kelly Landrum Jones, Sam Lutfi, Kevin Knupp, Nicholas Smith, Inerri, D.A. Noe, alexander wadsworth, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick Merrithew, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Justin Lentz ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://theconversation.com/mondays-medical-myth-you-can-catch-a-cold-by-getting-cold-2488 https://www.nytimes.com/2016/07/19/upshot/repeat-after-me-cold-does-not-increase-odds-of-catching-cold.html https://academic.oup.com/fampra/article/22/6/608/497956/Acute-cooling-of-the-feet-and-the-onset-of-common https://weather.com/health/news/why-we-catch-colds-when-the-weather-changes http://www.bbc.com/future/story/20151016-the-real-reason-germs-spread-in-the-winter https://www.cdc.gov/features/rhinoviruses/index.html https://medical-dictionary.thefreedictionary.com/pyrogen https://www.britannica.com/science/fever#ref195161 http://cmr.asm.org/content/26/1/135.full.pdf https://www.theguardian.com/news/2017/oct/06/why-cant-we-cure-the-common-cold http://www.ingentaconnect.com/contentone/iuatld/ijtld/2007/00000011/00000009/art00002 http://www.rhinologyjournal.com/Rhinology_issues/109_Eccles http://www.sciencedirect.com/science/article/pii/S0954611108003429 http://www.mdpi.com/1999-4915/8/9/244/htm http://journals.plos.org/plosone/article?id=10.1371/journal.pone.002148 http://www.sciencedirect.com/science/article/pii/S030698771500417X
Views: 211638 SciShow
Do Those Glasses Really Fix Colorblindness?
 
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You've seen those viral videos of colorblind people putting on special glasses and reacting to colors they've never seen before! Today, we'll explore how colorblindness works and what those glasses try to do to fix it! Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, D.A. Noe, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Nicholas Smith, Tim Curwick, Alexander Wadsworth, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://nei.nih.gov/health/color_blindness/facts_about http://cen.acs.org/articles/95/i6/Experimenting-EnChromas-color-blind-assistance.html http://www.smithsonianmag.com/innovation/scientist-accidentally-developed-sunglasses-that-could-correct-color-blindness-180954456/?no-ist https://pogue.blogs.nytimes.com/2013/08/15/glasses-that-solve-colorblindness-for-a-big-price-tag/?_r=1 https://www.ncbi.nlm.nih.gov/pubmed/6971497 www.dtic.mil/get-tr-doc/pdf?AD=ADA093031 http://faculty.washington.edu/sbuck/545ColorClass/Sharpe%26Jagle.2001.pdf http://www.sciencedirect.com/science/article/pii/S003962578180001X http://faculty.washington.edu/sbuck/545ColorClass/Sharpe%26Jagle.2001.pdf https://www.microsoft.com/en-us/garage/profiles/color-binoculars/ Images: https://commons.wikimedia.org/wiki/File:Cone-fundamentals-with-srgb-spectrum.svg https://commons.wikimedia.org/wiki/File:%D0%92%D0%B5%D1%87%D1%96%D1%80_%D0%BD%D0%B0_%22%D1%96%D0%BD%D1%82%D0%B5%D0%B3%D1%80%D0%B0%D0%BB%D1%96%22_-_%D1%80%D1%96%D1%87%D0%BA%D0%B0_%D0%9F%D1%96%D0%B2%D0%B4%D0%B5%D0%BD%D0%BD%D0%B8%D0%B9_%D0%91%D1%83%D0%B3.jpg https://commons.wikimedia.org/wiki/File:Deuteranopia_sight.jpg https://commons.wikimedia.org/wiki/File:Ishihara_9.png
Views: 533802 SciShow
Do Glasses Ruin Your Eyesight?
 
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Hank brings the answer into focus. Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.aao.org/eye-health/tips-prevention/five-vision-myths http://www.aoa.org/patients-and-public/eye-and-vision-problems/glossary-of-eye-and-vision-conditions/myopia?sso=y http://www.bbc.com/future/story/20140513-do-glasses-weaken-your-eyesight https://www.ncbi.nlm.nih.gov/pubmed/9243655 https://www.ncbi.nlm.nih.gov/pubmed/12445849 https://www.ncbi.nlm.nih.gov/pubmed/24674576 https://www.newscientist.com/article/dn3082-eye-correction-is-seriously-short-sighted/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4087177/ http://www.mayoclinic.org/diseases-conditions/eyestrain/basics/treatment/con-20032649 http://hyperphysics.phy-astr.gsu.edu/hbase/vision/eyedef.html#c1
Views: 1093087 SciShow
How Do You Get Rid of a Canker Sore?
 
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Do you suffer from canker sores? These little white balls of blinding pain can be annoying, but there is hope. Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.201.5865&rep=rep1&type=pdf http://www.merckmanuals.com/professional/dental-disorders/symptoms-of-dental-and-oral-disorders/recurrent-aphthous-stomatitis http://www.mayoclinic.org/diseases-conditions/canker-sore/basics/treatment/con-20021262 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4002348/ http://www.medscape.com/viewarticle/582101_2 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2710437/ https://cda-adc.ca/jcda/vol-75/issue-7/533.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3227248/
Views: 818431 SciShow
Why Do We Have Such Crooked Teeth?
 
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A lot of humans need or want braces to fix their crooked teeth, but why do you never see a dog walking down the street with headgear? Our ancient ancestors and mac and cheese may be to blame! *Correction: Even though hyraxes look similar to rodents, they're actually in the order Hyracoidea, not Rodentia! They're more closely related to elephants and manatees than to mice and guinea pigs.* Hosted by: Hank Green ---------- Learn more about the March for Science: https://www.marchforscience.com/ Knowledge Is Power Merch: https://store.dftba.com/collections/scishow Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.wired.com/2011/11/agriculture-jaw-shape/ http://www.pnas.org/content/108/49/19546 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0117301 https://www.ncbi.nlm.nih.gov/pubmed/19514263 http://www.sciencedirect.com/science/article/pii/S004724840400051X http://rspb.royalsocietypublishing.org/content/early/2011/06/07/rspb.2011.0971
Views: 802198 SciShow
Why Does Cold Brew Coffee Taste Better?
 
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Like it or hate it, cold brew coffee definitely tastes different than regular ol' drip, and it's all thanks to science. Hosted by: Hank Green Learn more about making coffee at youtube.com/learnhowtoadult ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin, Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.scaa.org/PDF/CoffeeBrewing-WettingHydrolysisExtractionRevisited.pdf http://legacy.sweetmarias.com/coffee_chemistry/tweaking_coffees_flavor_chem.html https://scienceandfooducla.wordpress.com/2014/08/19/coffee-brewing-chemistry-hot-brew-and-cold-brew/ http://www.bunn.com/sites/default/files/brochure/coffee_basics_scaa.pdf https://blog.intelligentsiacoffee.com/2017/01/17/extraction-theory-and-you/ https://www.beanscenemag.com.au/articles/view/socratic-coffee-explains-why-size-matters-part-iv http://cen.acs.org/articles/93/i33/Nitro-Cold-Brew.html http://theconversation.com/the-perfect-cup-of-coffee-boils-down-to-four-factors-30208
Views: 322993 SciShow
Why We Hallucinate While Falling Asleep
 
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Have you ever found yourself seeing images right before falling asleep? You might be experiencing hypnagogia. We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Inerri, D.A. Noe, Charles Southerland, Fatima Iqbal, سلطان الخليفي, Nicholas Smith, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.theatlantic.com/science/archive/2016/04/deciphering-hypnagogia/478941/ https://www.scientificamerican.com/article/tetris-dreams/ https://www.sleepassociation.org/patients-general-public/hallucinations-during-sleep/ http://www.merckmanuals.com/professional/neurologic-disorders/sleep-and-wakefulness-disorders/narcolepsy http://www.sciencedirect.com/topics/neuroscience/hypnagogia https://www.ncbi.nlm.nih.gov/pubmed/8894197 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4173919/ https://www.britannica.com/topic/dream-sleep-experience#ref423110 https://www.ncbi.nlm.nih.gov/pubmed/24051119 https://books.google.com/books?id=q_vpBAAAQBAJ&pg=PA117 https://www.psychologytoday.com/blog/dream-factory/201502/how-dream-salvador-dali http://www.bbc.com/future/story/20150409-i-have-exploding-head-syndrome https://www.merriam-webster.com/dictionary/hypnagogic https://pdfs.semanticscholar.org/09d8/95b85d772fb505144969310255c0cbdc74a7.pdf http://www.academia.edu/33150155/Replaying_the_Game_Hypnagogic_Images_in_Normals_and_Amnesics http://www.businessinsider.com/what-is-a-hypnic-jerk-2014-5 https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets/Myoclonus-Fact-Sheet https://www.sleepassociation.org/patients-general-public/sleep-myoclonus/ http://www.bbc.com/future/story/20120522-suffer-from-sleep-shudders
Views: 404104 SciShow
Why Was the WannaCry Attack Such a Big Deal?
 
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On Friday, May 12th, 2017, the ransomware program WannaCry started spreading to computers all over the world at an alarming rate. A couple days later, it was basically completely contained with very little damage done. So what happened? Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin, Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.cnet.com/news/wannacry-wannacrypt-uiwix-ransomware-everything-you-need-to-know/ http://www.npr.org/sections/thetwo-way/2017/05/15/528451534/wannacry-ransomware-what-we-know-monday https://www.cnet.com/news/ransomware-attack-cyberattack-malware/ https://www.symantec.com/connect/blogs/what-you-need-know-about-wannacry-ransomware https://technet.microsoft.com/en-us/library/hh831795(v=ws.11).aspx https://www.wired.com/2017/05/accidental-kill-switch-slowed-fridays-massive-ransomware-attack/ https://arstechnica.com/security/2017/05/fearing-shadow-brokers-leak-nsa-reported-critical-flaw-to-microsoft/ http://money.cnn.com/2017/05/16/technology/hospitals-vulnerable-wannacry-ransomware/ https://www.elliptic.co/wannacry/ https://www.ft.com/content/fa5ed73a-37e7-11e7-ac89-b01cc67cfeec http://www.bbc.com/news/world-europe-39907965 https://www.theverge.com/2017/5/14/15637888/authorities-wannacry-ransomware-attack-spread-150-countries https://www.wired.com/2017/05/wannacry-ransomware-hackers-made-real-amateur-mistakes/
Views: 675395 SciShow
Xenophyophores: The Strange Life of a Giant Single Cell
 
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You may think of single-celled organisms as being microscopically small, but these ocean dwellers are a little heftier than that. Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin, Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.researchgate.net/profile/Andrew_Gooday2 Tendal and Lewis, NZ Journal of Marine and Freshwater Research (1978), 12: 197-203 Swinbanks and Shirayama, Nature (1986), 320: 354-358 Hopwood et al, Journal of the Marine Biological Association of the UK (1997), 77: 969-987 Rothe et al, Deep Sea Research I (2011), 58: 1189-1195 Gooday et al, Biological Conservation (2017), 207: 106-116 http://oceanexplorer.noaa.gov/explorations/03windows/background/education/media/03win_giants.pdf http://news.nationalgeographic.com/news/2011/10/111026-deepest-mariana-trench-giant-amoebas-science-oceans/ ---------- Images: https://www.flickr.com/photos/51647007@N08/5277250609/ http://www.photolib.noaa.gov/htmls/expl6258.htm https://www.flickr.com/photos/51647007@N08/5277251291/
Views: 420922 SciShow
Why Can't You Bring Mercury Thermometers on Planes?
 
02:43
Mercury thermometers are handy and useful, but they could be extremely dangerous to bring on planes. We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Stefan Chin ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: KSam Lutfi, Kevin Knupp, Nicholas Smith, Inerri, D.A. Noe, alexander wadsworth, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick Merrithew, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Fatima Iqbal, Justin Lentz ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: References http://www.sciencedirect.com/science/article/pii/S0010938X06001028 http://www.airliners.net/photo/Air-Niugini/Fokker-100-F-28-0100/1132825 https://www.planespotters.net/airframe/Fokker/F100/VH-FKE-Alliance-Airlines-(Australia)/jPlrCodN https://www.ec.gc.ca/mercure-mercury/default.asp?lang=En&n=10C3AF2D-1 http://www.colgate.com/en/us/oc/oral-health/procedures/fillings/article/dental-amalgam-a-health-risk https://education.jlab.org/itselemental/ele080.html https://www.faa.gov/about/initiatives/hazmat_safety/more_info/?hazmat=56 Video Source: https://youtu.be/IrdYueB9pY4
Views: 230408 SciShow
Why Does Skipping Coffee Give Me Headaches?
 
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I normally drink about ten cups of coffee per day but today I decided to cut back and haven't had any caffeine but now my head hurts and I don't know why do YOU know why!? Caffeine! : https://www.youtube.com/watch?v=Xl1XBJLfIDU Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.sciencedaily.com/releases/2009/05/090501162805.htm https://www.ncbi.nlm.nih.gov/pubmed/26677204 https://www.ncbi.nlm.nih.gov/pubmed/15448977 https://www.ncbi.nlm.nih.gov/pubmed/18625110 http://www.smithsonianmag.com/science-nature/this-is-how-your-brain-becomes-addicted-to-caffeine-26861037/ http://bonhamchemistry.com/wp-content/uploads/2012/01/Caffeine_and_Adenosine.pdf http://www.sciencedirect.com/science/article/pii/S0074774205630073 https://www.ncbi.nlm.nih.gov/books/NBK223808/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3437321/ https://www.ncbi.nlm.nih.gov/pubmed/1846425 http://www.apa.org/monitor/2008/04/caffeine.aspx Images: https://commons.wikimedia.org/wiki/File:Caffeine_(1)_3D_ball.png https://commons.wikimedia.org/wiki/File:Caffeine_and_adenosine.svg https://commons.wikimedia.org/wiki/File:Caffeine_and_adenosine.svg
Views: 235398 SciShow
How Does Activated Charcoal Work?
 
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You may know it as a miracle powder or an ice cream flavor, but activated charcoal can do some pretty cool stuff. We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kelly Landrum Jones, Sam Lutfi, Kevin Knupp, Nicholas Smith, Inerri, D.A. Noe, alexander wadsworth, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick Merrithew, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Justin Lentz ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.watertechonline.com/the-basics-of-activated-carbon-adsorption/ https://www.britannica.com/technology/water-supply-system/Chlorination#ref1084834 https://www.ncbi.nlm.nih.gov/pubmed/3521259 https://www.ncbi.nlm.nih.gov/pubmed/3710499 http://www.tigg.com/what-is-activated-carbon.html https://www.drugs.com/monograph/charcoal-activated.html https://www.poison.org/articles/2015-mar/activated-charcoal https://www.britannica.com/science/van-der-Waals-forces http://www.nature.com/ajg/journal/v94/n1/full/ajg199931a.html
Views: 358732 SciShow
Do Fat Cells Ever Really Go Away?
 
02:30
Okay- you lost weight, but what actually happened to those fat-storing cells? Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Bella Nash, Kevin Bealer, Mark Terrio-Cameron, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Will and Sonja Marple, Philippe von Bergen, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://science.howstuffworks.com/life/cellular-microscopic/fat-cell3.htm http://qz.com/654647/everything-you-need-to-know-about-fat-cells/ http://www.nature.com/news/2008/080505/full/news.2008.800.html http://news.yale.edu/2015/03/02/new-fat-cells-created-quickly-losing-them Image: https://commons.wikimedia.org/wiki/File%3AFat_triglyceride_shorthand_formula.PNG
Views: 312874 SciShow
What's the Deal with Warts?
 
02:15
On today's Quick Question, we absolve the poor, humble toad of its wart-giving reputation. Learn about the virus that causes warts, how they spread, and what you can do to get rid of them. Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, D.A. Noe, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Nicholas Smith, Tim Curwick, Alexander Wadsworth, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.burkemuseum.org/blog/frog-myths http://www.mayoclinic.org/diseases-conditions/common-warts/basics/definition/con-20021715 https://www.health.harvard.edu/diseases-and-conditions/how-to-get-rid-of-warts http://www.webmd.com/skin-problems-and-treatments/warts-faq-questions-answers#1 http://www.webmd.com/skin-problems-and-treatments/tc/warts-and-plantar-warts-topic-overview#1
Views: 339513 SciShow
Why's a Meter a Meter?
 
04:45
Meter is the standard unit of length used by most countries around the world. But how did they define it? Hosted by: Hank Green Want more SciShow in person? We'll be at NerdCon: Nerdfighteria in Boston on February 25th and 26th! For more information, go to http://www.nerdconnerdfighteria.com/ ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.nist.gov/sites/default/files/documents/pml/div683/museum-timeline.pdf http://www.surveyhistory.org/the_standard_meter1.htm http://physics.nist.gov/cuu/Units/meter.html http://www.npl.co.uk/educate-explore/factsheets/history-of-length-measurement/ https://www.nist.gov/sites/default/files/documents/pml/div684/fcdc/sp330-2.pdf http://www.us-metric.org/origin-of-the-metric-system/ https://nature.berkeley.edu/classes/eps2/wisc/pt.html Image Sources: https://commons.wikimedia.org/wiki/File:Kilometre_definition.svg https://commons.wikimedia.org/wiki/File:Platinum-Iridium_meter_bar.jpg
Views: 464658 SciShow
6 Stupid and Dangerous Things Scientists Did to Themselves
 
10:24
From poking their own eyes, to drinking a patient's vomit, some extremely passionate scientists have done pretty outrageous things to themselves in the name of science. We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kelly Landrum Jones, Sam Lutfi, Kevin Knupp, Nicholas Smith, Inerri, D.A. Noe, alexander wadsworth, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick Merrithew, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Justin Lentz ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.newtonproject.ox.ac.uk/view/texts/normalized/NATP00004 http://aty.sdsu.edu/vision/others.html http://www.lib.cam.ac.uk/exhibitions/Footprints_of_the_Lion/private_scholar.html http://eyewiki.aao.org/Solar_Retinopathy https://pubs.acs.org/subscribe/archive/tcaw/13/i04/pdf/404chronicles.pdf http://publicdomainreview.org/2014/08/06/o-excellent-air-bag-humphry-davy-and-nitrous-oxide/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4439684/#sec1-3title http://alphahistory.com/pastpeculiar/1804-med-student-drinking-black-vomit/ https://collections.nlm.nih.gov/ext/mhl/2554015R/PDF/2554015R.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2441371/pdf/tacca00106-0113.pdf https://www.newyorker.com/tech/elements/demon-core-the-strange-death-of-louis-slotin http://nerdist.com/tickling-the-dragons-tail-the-story-of-the-demon-core/ https://xkcd.com/radiation/ https://www.nrc.gov/reading-rm/basic-ref/glossary/lethal-dose-ld.html http://mterasaki.us/etc/forssman.pdf http://www.annalsthoracicsurgery.org/article/0003-4975(90)90272-8/pdf Image Sources: https://commons.wikimedia.org/wiki/Category:Werner_For%C3%9Fmann#/media/File:Werner_Forssmann.jpg https://en.wikipedia.org/wiki/Werner_Forssmann#/media/File:Werner_Forssmann_nobel.jpg https://upload.wikimedia.org/wikipedia/commons/4/4d/Harry-K-Daghlian.gif https://commons.wikimedia.org/wiki/File:Tickling_the_Dragons_Tail.jpg https://commons.wikimedia.org/w/index.php?search=demon+core&title=Special:Search&profile=images&fulltext=1&searchToken=7flitf5fa448whcbbjy4p2qjw#/media/File:Slotin_accident_mockup-11.jpg https://en.wikipedia.org/wiki/Louis_Slotin#/media/File:Slotin_Los_Alamos.jpg https://en.wikipedia.org/wiki/File:YellowFeverVirus.jpg https://commons.wikimedia.org/w/index.php?search=Sir+Humphrey+Davy&title=Special:Search&go=Go&searchToken=2vgthm6rdc5x1bfnp8933abft#/media/File:Sir_Humphrey_Davy_1849_RGNb10408769.09.tif https://commons.wikimedia.org/wiki/Category:Nitrous_oxide#/media/File:Nitrous-oxide-3D-balls.png https://commons.wikimedia.org/wiki/File:Sir_Humphry_Davy,_Bt_by_Thomas_Phillips.jpg https://commons.wikimedia.org/wiki/Isaac_Newton#/media/File:Sir_Isaac_Newton_by_Sir_Godfrey_Kneller,_Bt.jpg https://commons.wikimedia.org/wiki/File:Bodkin_MET_224402.jpg https://commons.wikimedia.org/wiki/Isaac_Newton#/media/File:Isaac_Newton,_English_School,_1715-20.jpg
Views: 639219 SciShow
Why Do Some People Tolerate Spicy Food?
 
02:50
Some people can eat raw jalapeños like they're apples. Why do some people have a high tolerance for spicy food while others can't stand it? Hosted by:Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.sciencedirect.com/science/article/pii/S0950329312001917 http://www.popsci.com/science/article/2013-06/fyi-are-people-born-tolerance-spicy-food http://www.pbs.org/wgbh/nova/body/reed-taste.html https://books.google.com/books?hl=en&lr=&id=vvalCgAAQBAJ&oi=fnd&pg=PA77 book https://academic.oup.com/chemse/article-abstract/6/1/23/277878/The-role-of-desensitization-to-capsaicin-in-chili https://www.ncbi.nlm.nih.gov/pubmed/9035246 Image Sources: https://ja.wikipedia.org/wiki/%E3%82%AB%E3%83%97%E3%82%B5%E3%82%A4%E3%82%B7%E3%83%B3#/media/File:Capsaicin-3D-vdW.png
Views: 408345 SciShow
Thalidomide: The Chemistry Mistake That Killed Thousands of Babies
 
04:28
On October 1, 1957, thalidomide was introduced as a new morning sickness cure. Everything seemed great until later the next year, when thousands of infants were born with severe birth defects. We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Stefan Chin ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: D.A. Noe, Nicholas Smith, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Patrick D. Ashmore, Tim Curwick, charles george, Kevin Bealer, Philippe von Bergen, Chris Peters, Fatima Iqbal ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.ncbi.nlm.nih.gov/pubmed/15080764 https://link.springer.com/article/10.1023/A:1021008016719 http://connection.ebscohost.com/c/articles/17997789/untold-story-thalidomide-babies https://www.ncbi.nlm.nih.gov/pubmed/18031152 https://www.researchgate.net/publication/24400847_Chiral_Toxicology_It's_the_Same_ThingOnly_Different https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4112512/ ------ Images: https://en.wikipedia.org/wiki/Thalidomide#/media/File:NCP14053.jpg https://en.wikipedia.org/wiki/Thalidomide#/media/File:Thalidomide_enantiomers.svg
Views: 539277 SciShow
Should I Be Afraid of BPA?
 
02:41
BPA has had some bad press, and now we’re all wondering: Is BPA bad for us? Michael Aranda goes into how we encounter BPA in our lives and how it affects us. Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Jeremy Peng, Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Saul, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.essentialchemicalindustry.org/polymers/polycarbonates.html https://www.scientificamerican.com/article/just-how-harmful-are-bisphenol-a-plastics/ http://www.newsweek.com/2015/03/13/bpa-fine-if-you-ignore-most-studies-about-it-311203.html https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4805123/ https://www.ncbi.nlm.nih.gov/pubmed/23994667 https://www.ncbi.nlm.nih.gov/pubmed/25619032 http://www.fda.gov/newsevents/publichealthfocus/ucm064437.htm http://www.fda.gov/downloads/NewsEvents/PublicHealthFocus/UCM424266.pdf http://e360.yale.edu/feature/scientists_warn_of_low_dose_risk_of_endocrine_blocking_chemical_exposure/2507/ http://www.foodsafetywatch.org/factsheets/bisphenol-a/ Images: https://commons.wikimedia.org/wiki/File:Bisphenol_A.PNG https://commons.wikimedia.org/wiki/File:Polycarbonate_PC.png https://commons.wikimedia.org/wiki/File:Carbonyl-chloride.png https://commons.wikimedia.org/wiki/File:BPA-Free_Bottle.JPG
Views: 277651 SciShow
Why Do Cat Eyes Glow in the Dark?
 
02:15
Those eerie shining orbs staring at you from the bushes when you take the trash out at night could be any number of animals, but why do their eyes glow like that? Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—Alexander Wadsworth, Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.ncbi.nlm.nih.gov/pubmed/14738502 http://onlinelibrary.wiley.com/doi/10.1111/j.1463-5224.2004.00318.x/abstract https://www.ncbi.nlm.nih.gov/books/NBK10848/ http://hyperphysics.phy-astr.gsu.edu/hbase/vision/rodcone.html http://www.npr.org/templates/story/story.php?storyId=96414364 https://www.ncbi.nlm.nih.gov/pubmed/7386574 http://www.vetstreet.com/our-pet-experts/why-do-my-cats-eyes-glow-in-the-dark http://onlinelibrary.wiley.com/doi/10.1111/j.1439-0264.1986.tb00713.x/full ---------- Images: https://www.flickr.com/photos/sodaigomi/12263630486/in/photostream/ https://commons.wikimedia.org/wiki/File:Gambian_epauletted_fruit_bat_(Epomophorus_gambianus).jpg https://commons.wikimedia.org/wiki/File:Black-Lab-3-months-old-puppy.jpg https://www.flickr.com/photos/13316988@N00/2607304048/
Views: 319724 SciShow
How Often Do You Really Need to Shower?
 
02:40
Do you really need a daily shower to stay clean, or is it doing more harm than good? Some scientists have recommendations based on what we know about our skin — and what might be living on top of it. We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Stefan Chin ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Inerri, D.A. Noe, Charles Southerland, Fatima Iqbal, سلطان الخليفي, Nicholas Smith, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.npr.org/sections/health-shots/2015/01/12/375663920/the-doctor-who-championed-hand-washing-and-saved-women-s-lives http://www.npr.org/sections/health-shots/2015/03/31/396573607/meet-the-bacteria-that-make-a-stink-in-your-pits https://microbiomejournal.biomedcentral.com/articles/10.1186/s40168-017-0294-2 http://annals.org/aim/article/717252/effect-antibacterial-home-cleaning-handwashing-products-infectious-disease-symptoms-randomized http://time.com/4259559/shower-soap-hygiene/?xid=tcoshare https://www.northernorthopedics.com/patient-resources/a-patient-s-guide-to-surgery/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3535073/
Views: 576339 SciShow
What Happens If You Drink a Glass of Heavy Water?
 
04:21
Sign up for Brilliant for free at https://brilliant.org/scishow/ Heavy water, or deuterium oxide, has some important scientific applications, but let's say you're reeeeaallly thirsty... is it safe to drink? We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: D.A. Noe, Nicholas Smith, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Patrick D. Ashmore, Tim Curwick, charles george, Kevin Bealer, Philippe von Bergen, Chris Peters, Fatima Iqbal ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://pubs.acs.org/doi/abs/10.1021/cr50004a004 https://pubchem.ncbi.nlm.nih.gov/compound/deuterium_oxide http://www.clinsci.org/content/ppclinsci/80/4/277.full.pdf https://books.google.com/books?id=VbO2CwAAQBAJ&pg=PA135 http://shop.isotope.com/productdetails.aspx?itemno=DLM-6-PK http://pubs.acs.org/stoken/presspac/presspac/full/10.1021/ie101820f http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0169296 https://www.nrc.gov/reading-rm/doc-collections/fact-sheets/tritium-radiation-fs.html http://ajplegacy.physiology.org/content/201/2/357 https://www.scientificamerican.com/article/is-radioactive-hydrogen-in-drinking-water-a-cancer-threat/ http://rgw.arizona.edu/sites/researchgateway/files/radioactive_material_protection_reference_guide.pdf
Views: 872247 SciShow
What Does "A 50% Chance of Rain" Actually Mean?
 
02:17
Your friendly local weather person says there's a 10% chance it will rain today, so you throw on your flip-flops and head out to enjoy a beautiful day. Next thing you know, you're running through puddles, trying to get out of a torrential downpour. Bad luck or bad weather person? Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—Alexander Wadsworth, Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.weather.gov/ffc/pop https://weather.com/news/news/heres-why-it-rained-when-your-forecast-said-10-percent-20130816 https://www.forbes.com/sites/marshallshepherd/2015/11/27/do-you-or-your-meteorologist-understand-what-40-chance-of-rain-means/#e0adca725d56 http://journals.ametsoc.org/doi/abs/10.1175/WAF-D-15-0058.1
Views: 376834 SciShow
Can Danger Give You Super Strength?
 
02:18
SciShow is nominated for a Webby! Vote for us! https://vote.webbyawards.com/PublicVoting#/2017/film-video/video-channels-and-networks/science-education-channels-and-networks Have you ever heard that you become more powerful in life-or-death situations? There are a lot of anecdotes about super strength, but is it a real thing? Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.scientificamerican.com/article/extreme-fear-superhuman/ http://www.bbc.com/future/story/20160501-how-its-possible-for-an-ordinary-person-to-lift-a-car https://www1.udel.edu/chem/C465/senior/fall00/Performance1/epinephrine.htm.html https://www.unm.edu/~lkravitz/Article%20folder/stresscortisol.html https://www.psychologytoday.com/blog/extreme-fear/200912/superhuman-no-just-very-scared http://www.salisbury.edu/sportsperformance/Articles/INTENSITY%20OF%20STRENGTH%20TRAINING%20FACTS%20AND%20FALLACIES%20-%20ZATZIORSKY.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3073528/ Image Sources: https://commons.wikimedia.org/wiki/Category:Cortisol#/media/File:Cortisol-2D-skeletal.png https://commons.wikimedia.org/wiki/File:Epinephrine.png
Views: 315308 SciShow
Did Scientists Really Make Metallic Hydrogen?
 
05:52
The Researchers reconstructed the face of the organism which might be one of our earliest ancestors. Meanwhile, two researchers from Harvard announced that they have created solid metallic hydrogen. Hosted by: Hank Green Want more SciShow in person? We'll be at NerdCon: Nerdfighteria in Boston on February 25th and 26th! For more information, go to http://www.nerdconnerdfighteria.com/ ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://nature.com/articles/doi:10.1038/nature21072 https://www.eurekalert.org/emb_releases/2017-01/sjcu-bsc012617.php http://www.nature.com/nature/journal/v527/n7579/full/nature16150.html http://rspb.royalsocietypublishing.org/content/279/1727/237.long http://www.nature.com/nature/journal/v520/n7548/full/nature14434.html#gill-slits-are-a-deuterostome-innovation Simon Conway Morris, Personal Communication http://science.sciencemag.org/content/early/2017/01/25/science.aal1579 http://www.sciencemag.org/news/2017/01/diamond-vise-turns-hydrogen-metal-potentially-ending-80-year-quest http://www.nature.com/news/metallic-hydrogen-hard-pressed-1.10817 http://www.nature.com/news/physicists-doubt-bold-report-of-metallic-hydrogen-1.21379 https://www.nytimes.com/2017/01/26/science/solid-metallic-hydrogen-harvard-physicists.html?_r=0 http://www.sciencealert.com/hydrogen-has-been-turned-into-a-metal-for-the-first-time-ever https://arstechnica.com/science/2017/01/80-years-late-scientists-finally-turn-hydrogen-into-a-metal/ https://www.scientificamerican.com/article/the-race-to-turn-gassy-hydrogen-into-solid-metal/ https://phys.org/news/2017-01-metallic-hydrogen-theory-reality.html Image source: https://www.eurekalert.org/multimedia/pub/131719.php?from=348805 https://en.wikipedia.org/wiki/Protostome#/media/File:Protovsdeuterostomes.svg
Views: 782731 SciShow
Why Do We Get Nosebleeds?
 
03:34
One moment, you're fine. The next, moment it seems like your nose is recreating a scene from The Shining. Why do we get nosebleeds? Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, D.A. Noe, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Nicholas Smith, Tim Curwick, Alexander Wadsworth, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.uofmhealth.org/health-library/nosbd https://www.ncbi.nlm.nih.gov/books/NBK435997/ http://www.aafp.org/afp/2005/0115/p305.html#sec-2 http://care.american-rhinologic.org/epistaxis
Views: 802587 SciShow
Why Do Dogs Tilt Their Heads?
 
02:41
There's no question that a dog tilting its head is one of the cutest things possible, but why do they do it? Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin, Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.psychologytoday.com/blog/canine-corner/201312/why-do-some-dogs-tilt-their-heads-when-we-talk-them http://mentalfloss.com/article/70205/what-makes-dogs-tilt-their-heads http://tvblogs.nationalgeographic.com/2010/03/09/why-do-dogs-tilt-their-heads/ http://www.cell.com/current-biology/pdf/S0960-9822(14)01693-5.pdf https://books.google.com/books?id=P3GHg6R_O2UC&pg=PT869&lpg=PT869
Views: 1063750 SciShow
Can You Really Die of Old Age?
 
02:21
Even though age can contribute to someone’s death, it almost definitely won’t be the direct cause. We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Stefan Chin ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kelly Landrum Jones, Sam Lutfi, Kevin Knupp, Nicholas Smith, Inerri, D.A. Noe, alexander wadsworth, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick Merrithew, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Justin Lentz ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.livescience.com/32241-do-people-really-die-of-old-age.html http://www.abc.net.au/news/health/2017-06-14/can-you-die-from-old-age/8605896 http://learn.genetics.utah.edu/content/basics/telomeres/ http://www.medicaldaily.com/can-people-really-die-old-age-318528 ---------- Images: https://en.wikipedia.org/wiki/File:Telomere_caps.gif
Views: 244014 SciShow
Why Does Humidity Make It Feel Hotter?
 
03:11
It turns out there's a scientific explanation behind the saying, "It's not the heat, it's the humidity!" Learn why a hot and humid day feels so dismal and some tips to avoid the really sweaty, gross days on today's Quick Question! Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—Alexander Wadsworth, Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://media.bom.gov.au/social/blog/1324/feeling-hot-and-bothered-its-not-the-humidity-its-the-dew-point/ http://www.bbc.co.uk/schools/gcsebitesize/science/edexcel/responses_to_environment/homeostasisrev3.shtml http://www.weather.gov/arx/why_dewpoint_vs_humidity https://www.atmos.umd.edu/~stevenb/vapor/ http://hyperphysics.phy-astr.gsu.edu/hbase/Kinetic/relhum.html http://www.dpcalc.org/
Views: 342686 SciShow
Why Did The FDA Ban Antibacterial Soap?
 
02:59
Are you a bit of a germaphobe? Maybe think twice about using antibacterial soap. Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm517478.htm http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm378542.htm https://www.federalregister.gov/documents/2016/09/06/2016-21337/safety-and-effectiveness-of-consumer-antiseptics-topical-antimicrobial-drug-products-for https://www.ncbi.nlm.nih.gov/pubmed/16922622 http://www.jbc.org/content/274/16/11110.full http://www.sciencedirect.com/science/article/pii/S0195670102912028?via%3Dihub https://www.ncbi.nlm.nih.gov/pmc/articles/PMC478530/ https://academic.oup.com/cid/article-lookup/doi/10.1086/519255 http://www.tandfonline.com/doi/abs/10.1080/10739149.2013.803777 http://www.sciencedirect.com/science/article/pii/S0304415700000137 http://www.sciencedirect.com/science/article/pii/S0166445X10003292 http://www.sciencedirect.com/science/article/pii/S0269749109001833 https://www.ncbi.nlm.nih.gov/pubmed/20562219 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3572338/ https://academic.oup.com/toxsci/article/107/1/56/1664314/The-Effects-of-Triclosan-on-Puberty-and-Thyroid
Views: 525045 SciShow
Does the Camera Really Add Ten Pounds?
 
02:12
Your friend just tagged you in 17 photos on Facebook but you swear those photos lie about your weight. Is the camera playing tricks with your eyes? Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Jeremy Peng, Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Saul, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.businessinsider.com/cameras-can-make-you-look-fat-2016-7 http://sploid.gizmodo.com/watch-how-different-camera-lenses-can-make-you-look-fat-1784458991 https://expertphotography.com/understand-focal-length-4-easy-steps/ http://photo.stackexchange.com/questions/54185/difference-between-zoom-and-focal-length http://spiff.rit.edu/richmond/fat_camera/fat_camera.html http://mentalfloss.com/article/31895/do-cameras-really-add-10-pounds http://petapixel.com/2012/07/17/why-the-camera-adds-10-pounds-seeing-ourselves-in-pictures/ http://www.exposureguide.com/lens-basics.htm https://www.videomaker.com/article/c10/17027-what-is-focal-length Images: https://commons.wikimedia.org/wiki/File%3AZorki-4K.jpg https://commons.wikimedia.org/wiki/File%3AFocalLength.png https://commons.wikimedia.org/wiki/File%3AFocal_length_500mm.jpg https://commons.wikimedia.org/wiki/File%3AFocal_length_2000mm.jpg https://commons.wikimedia.org/wiki/File%3AFocal_length_f70mm.jpg https://commons.wikimedia.org/wiki/File%3AFocal_length_f200mm.jpg https://commons.wikimedia.org/wiki/File%3ACamera_focal_length_distance_house_animation.gif
Views: 220222 SciShow
Why do we Have Earwax?
 
02:46
No Judging: At one point you've probably put a finger in your ear and dug out some rather unsightly ear wax, but why does your body produce this yellowy substance in the first place? Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—Alexander Wadsworth, Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.britannica.com/demystified/why-do-we-have-earwax http://www.nature.com/ng/journal/v38/n3/abs/ng1733.html https://medlineplus.gov/ency/article/000979.htm https://academic.oup.com/qjmed/article/97/8/477/1588624/Impacted-cerumen-composition-production http://commonhealth.legacy.wbur.org/2012/11/q-tips-ears-danger http://www.entnet.org/content/earwax-and-care https://www.ncbi.nlm.nih.gov/pubmed/16835926 http://onlinelibrary.wiley.com/doi/10.1002/ar.a.20356/full http://europepmc.org/abstract/med/1870171
Views: 235037 SciShow
How Smart Are Animals, Really?
 
05:02
Measuring 'intellect' is a difficult task. Check out one way scientists are attempting to make this endeavor more testable. Hosted by: Hank Green SciShow is nominated for a Webby! Vote for us! https://vote.webbyawards.com/PublicVoting#/2017/film-video/video-channels-and-networks/science-education-channels-and-networks Hosted by: ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://phenomena.nationalgeographic.com/2014/04/22/this-is-how-you-study-the-evolution-of-animal-intelligence/ http://www.pnas.org/content/111/20/E2140 https://www.theatlantic.com/education/archive/2015/02/what-animals-teach-us-about-measuring-intelligence/386330/ http://www.slate.com/articles/health_and_science/science/2014/04/cat_intelligence_and_cognition_are_cats_smarter_than_dogs.html https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3207484/ http://www.neaq.org/blog/octopus-box/
Views: 394490 SciShow
Nitroglycerin: Explosive Heart Medication
 
03:55
Imagine a substance so powerful that it could blow you to bits or save your life depending on how you used it. Well imagine no more: such a substance exists and you've probably heard of it. Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Jeremy Peng, Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Saul, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://onlinelibrary.wiley.com/doi/10.1046/j.1440-1681.2000.03240.x/abstract https://www.brainpickings.org/2013/09/17/molly-oldfield-secret-museum-alfred-nobel-will/ http://antoine.frostburg.edu/chem/senese/101/redox/faq/nitroglycerin.shtml http://www.bbc.co.uk/history/historic_figures/nobel_alfred.shtml http://io9.gizmodo.com/5677950/the-explosive-that-became-a-heart-medicine http://www.mayoclinic.org/drugs-supplements/nitroglycerin-oral-route-sublingual-route/description/drg-20072863 http://www.straightdope.com/columns/read/2506/how-does-nitroglycerin-stop-heart-attacks http://npic.orst.edu/factsheets/degen.html
Views: 299148 SciShow
Do Epsom Salt Baths Do Anything?
 
02:46
You come home from an intense workout, muscles aching, and lower yourself into a warm epsom salt bath from some sweet relief. But are all those extra minerals really helping soothe your pain? Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: D.A. Noe, Nicholas Smith, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Patrick D. Ashmore, Tim Curwick, charles george, Kevin Bealer, Philippe von Bergen, Chris Peters, Fatima Iqbal ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.webmd.com/a-to-z-guides/epsom-salt-bath#1 https://www.painscience.com/articles/epsom-salts.php http://abcnews.go.com/Health/truth-epsom-salt/story?id=29675918 http://www.rd.com/health/wellness/does-epsom-salt-work/ http://www.exploringsurreyspast.org.uk/themes/places/surrey/epsom_and_ewell/epsom/ https://medlineplus.gov/ency/article/002423.htm https://bmcpregnancychildbirth.biomedcentral.com/articles/10.1186/1471-2393-13-34 http://www.epsomsaltcouncil.org/wp-content/uploads/2015/10/report_on_absorption_of_magnesium_sulfate.pdf
Views: 417281 SciShow
What Causes Runner's High?
 
02:56
After a good distance of running, you might have felt a sensation of happiness. That is the runner's high and some chemicals in your body cause it. Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shoutout to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.pnas.org/content/112/42/13105.full http://jeb.biologists.org/content/215/8/1331?sid%3D739917de-aaf2-469d-9f3a-ab04329720b7= http://www.sciencedirect.com/science/article/pii/S0306453011002873 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3104618/ Image Sources: https://commons.wikimedia.org/wiki/File:Anandamide_skeletal.svg https://commons.wikimedia.org/wiki/File:Beta-endorphin_1-9.png
Views: 396628 SciShow
The Man Who Tried to Give Himself An Ulcer... For Science
 
04:17
In 1984, Dr. Barry Marshall had a theory about ulcers that he couldn't convince the science community of. So, he took matters into his own hands... or stomach, and infected himself with a potentially deadly bacterium. Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shoutout to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://medlineplus.gov/pepticulcer.html http://discovermagazine.com/2010/mar/07-dr-drank-broth-gave-ulcer-solved-medical-mystery https://www.cancer.gov/about-cancer/causes-prevention/risk/infectious-agents/h-pylori-fact-sheet#q4 https://www.nobelprize.org/nobel_prizes/medicine/laureates/2005/warren-slides.pdf https://www.nobelprize.org/nobel_prizes/medicine/laureates/2005/warren-lecture.pdf https://www.nobelprize.org/nobel_prizes/medicine/laureates/2005/marshall-lecture.pdf https://www.nobelprize.org/nobel_prizes/medicine/laureates/2005/press.html https://www.cdc.gov/ulcer/history.htm https://www.ncbi.nlm.nih.gov/books/NBK2432/ https://www.nobelprize.org/nobel_prizes/medicine/laureates/2005/ Martin Blaser's "Missing Microbes" book, pp. 104-152 http://www.newyorker.com/magazine/2012/10/22/germs-are-us https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1283743/ http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(84)91816-6/abstract https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1539101/
Views: 268851 SciShow
What Happens If You Leave Your Contacts in for Too Long?
 
03:15
If you're wearing contacts, you might want to take a look at this. We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Inerri, D.A. Noe, Charles Southerland, Fatima Iqbal, سلطان الخليفي, Nicholas Smith, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://www.mirror.co.uk/news/uk-news/student-who-ripped-cornea-after-9161849 http://jezebel.com/student-keeps-contacts-in-for-six-months-amoeba-eats-1604319154 http://www.med.umich.edu/1libr/Ophthalmology/ContactLens/SignsofInfectionfromContactLenses.pdf http://www.allaboutvision.com/contacts/faq/cls-damage-eyes.htm http://www.allaboutvision.com/contacts/extended.htm http://www.ccmr.cornell.edu/faqs/why-are-eyeballs-wet/ http://www.masseyeandear.org/for-patients/patient-guide/patient-education/diseases-and-conditions/cornea/function http://www.d.umn.edu/~jfitzake/Lectures/DMED/Vision/Optics/Crying.html https://www.aao.org/eyenet/article/confronting-corneal-ulcers?july-2012 https://u.osu.edu/buckmdblog/2013/02/19/how-long-can-i-leave-my-contact-lenses-in/ http://www.aaojournal.org/article/S0161-6420(99)00027-5/fulltext https://www.ncbi.nlm.nih.gov/pubmed/12394550 https://www.ncbi.nlm.nih.gov/pubmed/3863808 https://www.ncbi.nlm.nih.gov/books/NBK234044/
Views: 396375 SciShow