На главную
Видео добавленное пользователем “SciShow” за 2012
So what IS the Higgs boson?
 
05:17
Hank responds to viewer questions, and explains what the Higgs boson particle actually IS. Follow SciShow on Twitter: http://www.twitter.com/scishow Like SciShow on Facebook: http://www.facebook.com/scishow
Просмотров: 953841 SciShow
Liquid Fluoride Thorium Reactors (LFTR): Energy for the Future?
 
03:14
Hank addresses a highly requested topic - liquid fluoride thorium reactors - and tells us how LFTR might be the future of energy in ... China? Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References: http://www.washingtonpost.com/national/health-science/nuclear-power-entrepreneurs-push-thorium-as-a-fuel/2011/12/15/gIQALTinPR_story.html http://theweek.com/article/index/213611/could-thorium-make-nuclear-power-safe
Просмотров: 594530 SciShow
IDTIMWYTIM: Schrodinger's Cat
 
03:53
"I Don't Think It Means What You Think It Means" examines scientific theories that have taken on a life of their own in popular culture & we help you understand what they really mean in scientific terms. Today we take on Schrodinger's Cat, the famous thought experiment by Austrian physicist Erwin Schrodinger. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://dft.ba/-2DJZ
Просмотров: 1113619 SciShow
Tardigrades: Adorable Extremophiles
 
04:20
Hank explains why NASA and the European Space Agency are in love with tardigrades and how these extremophiles are helping us study the panspermia hypothesis. Follow SciShow on Twitter! http://www.twitter.com/scishow Like SciShow on Facebook! http://www.facebook.com/scishow
Просмотров: 1221175 SciShow
Strong Interaction: The Four Fundamental Forces of Physics #1a
 
03:37
Part one of a four part series on the fundamental forces (or interactions) of physics begins with the strong force or strong interaction - which on the small scale holds quarks together to form protons, neutrons and other hadron particles. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow
Просмотров: 781613 SciShow
Bath Salts
 
03:44
Hank talks about the scary new drug that's led to some recent incidences of goat stabbing, as well as other tragedies - bath salts. We learn how it works and ask the important question: why? Like SciShow? http://www.facebook.com/scishow Follow SciShow! http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://dft.ba/-3s-1
Просмотров: 1804387 SciShow
Epigenetics
 
09:29
Hank & his clone Circus Hank explain the power of epigenetics, which studies the factors that determine how much or whether some genes are expressed in your body. Like SciShow on Facebook! http://www.facebook.com/scishow Follow SciShow on Twitter! http://www.twitter.com/scishow More SciShow! Solar Energy - http://youtu.be/4uPVZUTLAvA Foldit Gamers FTW - http://youtu.be/JdBcpdH_ptA
Просмотров: 1819187 SciShow
IDTIMWYTIM: Radiation
 
03:04
Hank explains the whole story about radiation - the good, the extremely helpful, and the bad. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow
Просмотров: 483608 SciShow
Caffeine!
 
04:31
Hank delves into the details about that very popular substance: caffeine. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow SOURCES http://coffeefaq.com/site/node/17 http://www.ncpa.org/sub/dpd/index.php?Article_ID=13971 http://www.wisegeek.com/what-are-natural-sources-of-caffeine.htm http://www.wisegeek.com/what-is-kola-nut.htm http://www.independent.co.uk/news/science/under-the-microscope-how-does-caffeine-work-1993056.html http://chemistry.about.com/od/moleculescompounds/a/caffeine.htm http://en.wikipedia.org/wiki/Caffeine http://en.wikipedia.org/wiki/Kola_nut http://www.erowid.org/chemicals/caffeine/caffeine_info1.shtml#2 http://coffeefaq.com/site/node/12
Просмотров: 1324391 SciShow
Weak Interaction: The Four Fundamental Forces of Physics #2
 
04:00
Hank continues our series on the four fundamental forces of physics by describing the weak interaction, which operates at an infinitesimally small scale to cause particle decay. Watch the video on Strong Interaction: http://www.youtube.com/watch?v=Yv3EMq2Dgq8 Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References: http://hyperphysics.phy-astr.gsu.edu/hbase/forces/funfor.html#c4 http://hyperphysics.phy-astr.gsu.edu/hbase/forces/funfor.html#c5
Просмотров: 575326 SciShow
The Fibonacci Sequence: Nature's Code
 
03:20
Hank introduces us to the most beautiful numbers in nature - the Fibonacci sequence. Like SciShow: http://www.facebook.com/scishow Follow SciShow: http://www.twitter.com/scishow Vi Hart's Fibonacci series starts here: http://www.youtube.com/watch?v=ahXIMUkSXX0 References: http://mathdude.quickanddirtytips.com/what-is-the-fibonacci-sequence.aspx http://mathdude.quickanddirtytips.com/what-is-the-golden-ratio.aspx http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibnat.html http://thesavoia.com/2012/06/04/the-golden-ratio-in-flowers/
Просмотров: 1151908 SciShow
Absolute Zero: Absolute Awesome
 
03:16
Hank explains absolute zero: -273.15 degrees Celsius - and the coldest place in the known universe may surprise you. A correction on our use of the phrase "degrees Kelvin" can be found in this video: http://www.youtube.com/watch?v=OA98hl7Q5dQ - beginning at 6:43. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References: Minimum zero point energy derived from uncertainty principle: http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/hosc4.html#c1
Просмотров: 1685765 SciShow
IDTIMWYTIM: Heisenberg Uncertainty Principle
 
03:16
The Heisenberg Uncertainty Principle might not mean what you think it means: Hank clears things up for us in this edition of IDTIMWYTIM, by distinguishing between the Uncertainty Principle and the Observer Effect, which are often conflated. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References: http://hyperphysics.phy-astr.gsu.edu/hbase/uncer.html http://science.howstuffworks.com/innovation/science-questions/quantum-suicide2.htm http://www.aip.org/history/heisenberg/p08.htm
Просмотров: 544650 SciShow
The Science of the Cinnamon Challenge
 
03:14
Hank explains the science behind the "cinnamon challenge," and reveals why it is nearly impossible to complete. Do not attempt the cinnamon challenge! Instead, why not just watch some videos of the thousands of YouTubers failing at it! That's what we at SciShow call doing it "the Smart Way." Like SciShow: http://www.facebook.com/scishow Follow SciShow: http://www.twitter.com/scishow Watch John try the cinnamon challenge on Crash Course World History: http://www.youtube.com/watch?v=HQPA5oNpfM4 References http://www.wired.com/wiredscience/2012/02/the-cinnamon-challenge-why/ http://bittelmethis.com/is-the-cinnamon-challenge-dangerous/ http://www.cinnamonchallenge.com/
Просмотров: 1205796 SciShow
The Science of Dreaming
 
09:03
Dreaming is one of the weirdest things we do & in this SciShow infusion Hank talks about how science is helping us understand why we dream, what our brains are up to when they're doing it, and why dreaming may be critically important to the function of our waking brain. He also touches on the fascinating subject of lucid dreaming. Try to stay awake! Like SciShow! http://www.facebook.com/scishow Follow SciShow: http://www.twitter.com/scishow ReferencesDreams help us solve puzzles (http://www.saramednick.com/htmls/pdfs/Cai_PNAS_2009.pdf) (http://www.ncbi.nlm.nih.gov/pubmed/14737168?dopt=Abstract) http://opinionator.blogs.nytimes.com/2010/03/19/why-we-need-to-dream/ Lucid Dreaming http://www.scientificamerican.com/article.cfm?id=how-to-control-dreams http://www.scientificamerican.com/blog/post.cfm?id=inception-is-a-clunker-but-lucid-dr-2010-08-02 General: http://scienceblogs.com/cortex/2006/12/the_neuroscience_of_dreaming.php http://www.sciencenews.org/view/generic/id/335866/title/First_brain_image_of_a_dream_created http://www.saramednick.com/htmls/pdfs/Cai_PNAS_2009.pdf http://www.scientificamerican.com/article.cfm?id=the-science-behind-dreaming http://www.pbs.org/wgbh/nova/body/stickgold-dreams.html http://www.ncbi.nlm.nih.gov/pubmed/14737168?dopt=Abstract http://www.nature.com/neuro/journal/v10/n1/abs/nn1825.html IMAGES: http://en.wikipedia.org/wiki/File:Sigmund_Freud_LIFE.jpg [PUBLIC DOMAIN] http://en.wikipedia.org/wiki/File:Die_Traumdeutung.jpg [public domain] http://patientinfo.nimh.nih.gov/CC/Nimages/EEG3Large.jpg [public domain]
Просмотров: 1394264 SciShow
Electromagnetism - Magnetic Force: The Four Fundamental Forces of Physics #4b
 
03:18
In this final segment on the four fundamental forces of physics, Hank tackles the magnetic force, the second of the two ways in which electromagnetism is apparent in the universe. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com.scishow References: http://www.magnet.fsu.edu/mediacenter/publications/flux/vol2issue2/milestones.html http://theory.uwinnipeg.ca/mod_tech/node83.html http://www.magnet.fsu.edu/ http://www.explainthatstuff.com/magnetism.html Forces of Nature by P.C.W. Davies Introduction to Elementary Particles by David Griffiths
Просмотров: 568390 SciShow
3 Amazing Photosynthetic Animals
 
03:54
Hank's love affair with plants takes a slight hit now that he's learned about several animal species that can photosynthesize. Fortunately, he's excited enough about these animals to share them with all of us! Let SciShow introduce you to three these special photosynthetic animals. Like SciShow! http://www.facebook.com/scishow Follow SciShow! http://www.twitter.com/scishow References and image licenses for this episode can be found in the Google document here: http://dft.ba/-2Dwr
Просмотров: 463404 SciShow
3 Things You Didn't Know About Voyager
 
03:18
Hank tells us three things we probably didn't know about the Voyager 1 spacecraft. Like SciShow on Facebook! http://www.facebook.com/scishow Follow SciShow on Twitter! http://www.twitter.com/scishow References for this episode can be found in the Google document here:http://dft.ba/-3p-e
Просмотров: 416262 SciShow
Dark Matter
 
03:06
Physicists estimate that dark matter accounts for about twenty three percent of the known universe - the only problem is that no one really knows what it is... Like SciShow? http://www.facebook.com/scishow Follow Scishow! http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://dft.ba/-3fCA
Просмотров: 498420 SciShow
Alan Turing: Great Minds
 
03:27
Hank introduces us to that great mathematical mind, Alan Turing, who, as an openly gay man in the early 20th century faced brutal prejudice that eventually led to his suicide, despite being a genius war hero who helped the Allies defeat the Nazis. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://dft.ba/-36J3
Просмотров: 421340 SciShow
Obesity
 
11:59
Hank tells us some of the surprising things that could be causing or contributing to the obesity epidemic. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References: http://www.nlm.nih.gov/medlineplus/news/fullstory_118194.html http://www.cdc.gov/obesity/data/trends.html http://news.bbc.co.uk/2/hi/health/7151813.stm http://news.discovery.com/human/gut-bacteria-obesity-111026.html
Просмотров: 1624108 SciShow
Oxygen is Killing You
 
03:38
Hank introduces us to oxygen - the element that makes it possible for most animals to live, but which is simultaneously responsible for a lot of bad things going on in our bodies. Like SciShow: http://www.facebook.com/scishow Follow SciShow: http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://dft.ba/-1qC6
Просмотров: 1746059 SciShow
Space Elevators
 
03:10
Hank talks about space elevators, and why we shouldn't expect to see one any time soon. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://dft.ba/-33cf
Просмотров: 730721 SciShow
5 Weird Reasons Not to Smoke
 
02:31
Hank gives you five MORE reasons why you should probably avoid smoking, or quit if you already smoke - in addition to those big ones you already know about. These are the weird reasons. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://dft.ba/-2WvR
Просмотров: 1886837 SciShow
Mind-controlling Parasites!
 
04:23
Hank introduces us to some freaky parasites that use mind control to hijack the brains of their hosts. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow Human parasites episode: http://www.youtube.com/watch?v=ABeBqbBy2Lo Sources: http://www.npr.org/2011/10/30/141832947/invasion-of-the-mind-controlling-parasites http://www.nature.com/nature/journal/v440/n7085/full/440756a.html http://news.nationalgeographic.com/news/2005/09/0901_050901_wormparasite.html http://www.radiolab.org/2009/sep/07/the-scratch/ http://wwwnc.cdc.gov/eid/article/9/11/03-0143_article.htm http://www.redorbit.com/news/health/1657166/researchers_link_parasites_to_schizophrenia/ Images: http://www.google.com/imgres?hl=en&safe=off&biw=1256&bih=679&tbm=isch&tbnid=53z9OwQxy-fUkM:&imgrefurl=http://www.ars.usda.gov/Main/docs.htm%3Fdocid%3D11013&docid=pRO86T98uVCe1M&imgurl=http://www.ars.usda.gov/images/docs/11013_11207/toxocomposite2.jpg&w=530&h=376&ei=WVrzTsPHB4eOiALdoKzRDQ&zoom=1&iact=hc&vpx=257&vpy=197&dur=4091&hovh=189&hovw=267&tx=100&ty=211&sig=100978043779609351469&page=1&tbnh=143&tbnw=191&start=0&ndsp=18&ved=1t:429,r:1,s:0 http://farm7.static.flickr.com/6149/5977688562_c903b84c84.jpg http://en.wikipedia.org/wiki/File:Paragordius_tricuspidatus.jpeg http://en.wikipedia.org/wiki/File:Spinochordodes_in_Meconema.jpg http://www.google.com/imgres?hl=en&safe=off&biw=1256&bih=679&tbm=isch&tbnid=53z9OwQxy-fUkM:&imgrefurl=http://www.ars.usda.gov/Main/docs.htm%3Fdocid%3D11013&docid=pRO86T98uVCe1M&imgurl=http://www.ars.usda.gov/images/docs/11013_11207/toxocomposite2.jpg&w=530&h=376&ei=WVrzTsPHB4eOiALdoKzRDQ&zoom=1&iact=hc&vpx=257&vpy=197&dur=4091&hovh=189&hovw=267&tx=100&ty=211&sig=100978043779609351469&page=1&tbnh=143&tbnw=191&start=0&ndsp=18&ved=1t:429,r:1,s:0
Просмотров: 633839 SciShow
Terminal Velocity
 
01:38
The terminal velocity of an object is the speed at which the force of drag equals the force of gravity on that object. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twiter: http://www.twitter.com/scishow Narrated by Michael Aranda: http://www.youtube.com/michaelaranda All video footage used via Creative Commons license. See the full videos at the links below: http://www.youtube.com/watch?v=nbTFWgLgvDE&hd=1 http://www.youtube.com/watch?v=B35s153JxxE&hd=1 http://www.youtube.com/watch?v=nSYfQm1kHdc&hd=1 http://www.youtube.com/watch?v=Y6l_Aks8kZw&hd=1 http://www.youtube.com/watch?v=vSy-Noso0Rw&hd=1 http://www.youtube.com/watch?v=10pWfDUGcqI&hd=1 http://www.youtube.com/watch?v=Kgl2Ask22-M&hd=1 http://www.youtube.com/watch?v=CI4ZuXjRh6A&hd=1 http://www.youtube.com/watch?v=-QyxXGoYB_w&hd=1 http://www.youtube.com/watch?v=vznQxEedxDo&hd=1 http://www.youtube.com/watch?v=NH6lKiMq_v4&hd=1
Просмотров: 288741 SciShow
3 New Facts About Denisovans
 
03:11
Hank brings us some late-breaking news from the genus Homo - a team of scientists has sequenced the genome of the Denisova hominin, the latest member to be added to the human family tree. Like SciShow: http://www.facebook.com/scishow Follow SciShow: http://www.twitter.com/scishow Reference http://www.mpg.de/6328259/denisovan_genome1
Просмотров: 172901 SciShow
Earth's Not-So-Juicy Center
 
04:36
Hank takes us on a journey to center of the Earth to explain both how the solid core formed and why it is so important for life as we know it. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow Sources: http://www.ordons.com/asia/far-east/9976-sakhalin-1-project-drills-worlds-longest-extended-reach-well.html http://pubs.usgs.gov/gip/dynamic/inside.html http://sohowww.nascom.nasa.gov/gallery/Particle/solwind.html http://commons.wikimedia.org/wiki/File:%27Journey_to_the_Center_of_the_Earth%27_by_%C3%89douard_Riou_41.jpg
Просмотров: 433257 SciShow
The Chemistry of Addiction
 
11:50
Hank describes how our brains respond biochemically to various addictive substances and behaviors and where those responses have come from, evolutionarily speaking. Like SciShow: http://www.facebook.com/scishow Follow SciShow: http://www.twitter.com/scishow Sources http://www.eurekalert.org/pub_releases/2012-06/joso-dti053112.php http://www.nytimes.com/2012/06/06/opinion/the-dsm-gets-addiction-right.html?_r=1 http://www.drugabuse.gov/sites/default/files/sciofaddiction.pdf http://www.livescience.com/15563-addiction-defined-brain-disease.html http://www.treatment4addiction.com/addiction/behavioral/ http://www.scripps.edu/newsandviews/e_20100405/kenny.html http://www.economist.com/node/16056339 http://www.psychologytoday.com/blog/love-doc/200910/what-drives-sex-addict http://bigthink.com/going-mental/your-brain-on-drugs-dopamine-and-addiction http://www.psychologytoday.com/blog/brain-bootcamp/200907/techno-addicts http://www.pbs.org/wgbh/pages/frontline/shows/heroin/brain/ http://www.utexas.edu/research/asrec/dopamine.html http://www.psychologytoday.com/articles/199409/inside-the-addicts-brain http://teens.drugabuse.gov/facts/facts_brain1.php http://www.macalester.edu/academics/psychology/whathap/ubnrp/serialkillers/neurons.html http://www.health.harvard.edu/newsweek/Treating_opiate_addiction_Detoxification_and_maintenance.htm http://www.sciencedaily.com/releases/2011/02/110222121913.htm http://www.ncbi.nlm.nih.gov/books/NBK10795/ http://www.psychologytoday.com/articles/200411/addiction-pay-attention http://www.psychologytoday.com/blog/your-brain-food/201106/enhancing-marijuana-in-the-brain-advil http://www.nature.com/neuro/journal/v13/n5/abs/nn.2519.html http://www.sciencedaily.com/releases/2010/09/100929171819.htm Images: http://commons.wikimedia.org/wiki/File:Dopamine_pathways.svg http://commons.wikimedia.org/wiki/File:Dopamine.png http://commons.wikimedia.org/wiki/File:Gambling_chips.jpg http://www.drugabuse.gov/sites/default/files/images/colorbox/aslide24.gif http://blog.citizen.apps.gov/howtomobile/files/2012/03/email.jpg http://commons.wikimedia.org/wiki/File:Cocaine_lines_2.jpg https://news.tn.gov/system/files/Heroin.JPG
Просмотров: 1049038 SciShow
How Weed Works: THC
 
04:25
Hank explains the science behind the effects of that wackiest of weeds, cannabis sativa - aka marijuana. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow Citations http://www.nida.nih.gov/infofacts/marijuana.html http://science.howstuffworks.com/marijuana3.htm http://www.chm.bris.ac.uk/motm/anandamide/ananh.htm http://medicalmarijuana.procon.org/view.answers.php?questionID=637 The Botany of Desire by Michael Pollan http://www.springerlink.com/content/q450642638287947/ http://www.nytimes.com/2008/09/09/science/09obdrug.html Images http://upload.wikimedia.org/wikipedia/commons/d/d1/THC.svg http://upload.wikimedia.org/wikipedia/commons/b/b7/Cannabis_plant2.jpg http://upload.wikimedia.org/wikipedia/commons/f/f9/Rnt_Anandamide.jpg http://upload.wikimedia.org/wikipedia/commons/4/44/Cannabinoid_Receptor.png
Просмотров: 2823572 SciShow
IDTIMWYTIM: Stochasticity - THAT'S Random
 
02:49
Hank helps us understand the difference between the colloquial meaning of randomness, and the scientific meaning, which is also known as stochasticity. We will learn how, in fact, randomness is surprisingly predictable. Like SciShow: http://www.facebook.com/scishow Follow SciShow: http://www.twitter.com/scishow References http://scienceblogs.com/mikethemadbiologist/2006/07/06/randomness-versus... http://www.leancrew.com/all-this/2009/06/stochasticity/
Просмотров: 264167 SciShow
Fritz Haber: Great Minds
 
09:41
Hank introduces us to the brilliant and heartless Fritz Haber, a great mind who is considered "the father chemical warfare," but who also made discoveries and innovations that helped lead to the Green Revolution which is credited with preventing the starvation of over a billion people. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow Sources: http://www.nobelprize.org/nobel_prizes/chemistry/laureates/1918/haber-bio.html http://www.npr.org/programs/morning/features/2002/jul/fritzhaber/ http://www.scientificamerican.com/article.cfm?id=nitrogen-fertilizer-anniversary http://science.howstuffworks.com/dictionary/famous-scientists/chemists/fritz-haber-info.htm http://www.bbc.co.uk/news/world-13015210 http://www.theglobalist.com/StoryId.aspx?StoryId=9408 http://www.idsia.ch/~juergen/haberbosch.html http://www.vision.org/visionmedia/article.aspx?id=10696 The Omnivore’s Dilemma by Michael Pollan http://www.britannica.com/EBchecked/topic/250759/Fritz-Haber/260673/Chemical-warfare Images: http://commons.wikimedia.org/wiki/File:Fritz_Haber.png [public domain] http://commons.wikimedia.org/wiki/File:The_Second_Battle_of_Ypres.jpg [public domain] http://en.wikipedia.org/wiki/File:Clara_Immerwahr.jpg [public domain] http://www.nasa.gov/centers/goddard/images/content/95643main_dead_zone02STILL.0240.tif [public domain] http://www.ers.usda.gov/AmberWaves/September11/Features/Photos/feature4.jpg {public domain]
Просмотров: 459676 SciShow
Cavitation
 
03:02
Hank tells you about cavitation - the power of tiny bubbles to weaken metal, kill fish & maybe even cure cancer. Follow SciShow on Twitter: http://www.twitter.com/scishow Like SciShow on Facebook: http://www.facebook.com/scishow
Просмотров: 330013 SciShow
Electromagnetism - Electrostatic Force: The Four Fundamental Forces of Physics #4a
 
03:38
Hank reaches the fourth and final of the four fundamental interactions in physics: electromagnetism. In this part, he teaches us about the electrostatic force, which builds up a charge in an object and can travel in the form of an electron stream. Stay tuned for Part II, where we will finish up the series with the magnetic force. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References: http://abyss.uoregon.edu/~js/21st_century_science/lectures/lec04.html http://www.explainthatstuff.com/electricity.html http://regentsprep.org/Regents/physics/phys03/acoulomb/default.htm
Просмотров: 567730 SciShow
IDTIMWYTIM: Centrifugal Force
 
02:43
In this edition of IDTIMWYTIM, Hank addresses the so-called centrifugal force, and explains why you really mean centripetal force. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References for this episode: http://www.lhup.edu/~dsimanek/glossary.htm http://phun.physics.virginia.edu/topics/centrifugal.html http://www.newton.dep.anl.gov/askasci/phy00/phy00305.htm
Просмотров: 305851 SciShow
Henrietta Leavitt & the Human Computers: Great Minds
 
03:58
Henrietta Swan Leavitt was one of a number of volunteer women astronomers who were allowed to serve as "computers" at Harvard College Observatory, doing tedious work male scientists wouldn't do, and ultimately making a discovery now known as Leavitt's Law, which allows us to measure the distance to stars. Like SciShow: http://www.facebook.com/scishow Follow SciShow: http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://dft.ba/-3f62
Просмотров: 202078 SciShow
3 Sad Surprises: The Human Genome Project
 
03:34
Hank tells us three surprises about human DNA which we learned because of the Human Genome Project. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow Find out more about the Human Genome Project at www.ornl.gov/hgmis and about the National Human Genome Research Institute at http://www.genome.gov
Просмотров: 523185 SciShow
The End of Everything
 
10:52
Hank gives us an inclusive overview of how everything in the universe is thought to have begun, and how cosmologists predict it will all come to an end. Now get happy! Like SciShow: http://www/facebook.com/scishow Follow SciShow: http://www.twitter.com/scishow References and image licenses for this episode in the Google document here: http://dft.ba/-38I3 Links to other pertinent SciShow videos: Dark Energy http://www.youtube.com/watch?v=ATwVApurIQ4 Climate Change http://www.youtube.com/watch?v=M2Jxs7lR8ZI Yellowstone Super Volcano http://www.youtube.com/watch?v=_PxDGiVQNg8 How to Stop an Asteroid: http://www.youtube.com/watch?v=OlbaYbWuPCU Tardigrades/Extremophiles: http://www.youtube.com/watch?v=6H0E77TdYnY The End of the Universe: http://www.youtube.com/watch?v=munzrxJ0OYQ @ 1:43 Fundamental Forces of Physics Playlist: http://www.youtube.com/playlist?list=PLsNB4peY6C6JDc1HcVKjjYzVB0BYEXexd
Просмотров: 1464882 SciShow
Blazars Are A Thing
 
03:16
Hank explains how quasars and blazars are both the same thing - just oriented differently in respect to us - and how that impacts the way we perceive them and how it also effects the ways we can study them. Like SciShow: http://www.facebook.com/scishow Follow SciShow: http://www.twitter.com/scishow References http://imagine.gsfc.nasa.gov/docs/science/know_l1/active_galaxies.html http://www.nrao.edu/pr/2005/fastblazars/index-p.shtml http://www.sciencemag.org/content/292/5524/1985.1.summary
Просмотров: 517765 SciShow
Mass Extinctions
 
10:26
Hank takes us on a trip through time to revisit the 5 major mass extinction events that have impacted species over the Earth's history, and leaves us with some thoughts about what could possibly be the sixth event - the one caused by human activities. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://bit.ly/KOHsM5
Просмотров: 846311 SciShow
Yellowstone Super Volcano
 
04:03
Hank reveals the details about the giant volcano in Yellowstone National Park. Like Scishow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow Sources: http://volcanoes.usgs.gov/yvo/about/faq/faqsupervolcano.php http://volcanoes.usgs.gov/yvo/about/faq/faqactivity.php http://news.nationalgeographic.com/news/2006/03/0301_060301_yellowstone.html http://news.nationalgeographic.com/news/2007/11/071108-yellowstone.html http://ngm.nationalgeographic.com/2009/08/yellowstone/achenbach-text http://news.nationalgeographic.com/news/2007/07/070705-india-volcano.html Images: http://en.wikipedia.org/wiki/File:Yellowstone_Caldera_map2.jpg http://en.wikipedia.org/wiki/File:HuckleberryRidgeTuff.jpg http://volcanoes.usgs.gov/yvo/images/2000-rbs-3.2volcanicashcover_large.jpg http://upload.wikimedia.org/wikipedia/commons/1/18/Yellowstone_Caldera.svg
Просмотров: 1048188 SciShow
The Mysterious Leap Second
 
04:33
Leap Day's got nothing on the Leap SECOND! Hank explains why a second is being added to 2012 and why some are upset about it. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow
Просмотров: 313057 SciShow
Altruism
 
03:29
Hank explains the evolutionary basis for altruistic behavior in animals, including vampire bats! Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://dft.ba/-2Wvz
Просмотров: 576398 SciShow
The Secret of Your "Junk," Revealed!
 
03:02
Hank brings us breaking news from a team of geneticists working on figuring out what all that "junk DNA" in the human genome really is - turns out it's not junk after all. Like SciShow: http://www.facebook.com/scishow Follow SciShow: http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://dft.ba/-3xNS
Просмотров: 199468 SciShow
Rare Earth Elements
 
04:16
Hank reveals why our love affair with the rare earth elements has a dark side. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References: http://washingtonindependent.com/101462/california-mine-represents-hope-... http://www.nytimes.com/2011/03/09/business/energy-environment/09rare.htm... http://minerals.usgs.gov/minerals/pubs/commodity/rare_earths/
Просмотров: 772826 SciShow
Why Our Brains Love Junk Food
 
03:29
Hank explains the scientific reasons behind why we humans generally prefer to eat donut hamburgers to carrots. Like SciShow: http://www.facebook.com/scishow Follow SciShow: http://www.twitter.com/scishow References Diet & the evolution of the earliest human ancestors - http://www.pnas.org/content/97/25/13506.full Australopithecus: Diet - http://en.wikipedia.org/wiki/Australopithicus#Diet Did cooking make us human? - http://www.youtube.com/watch?v=rf_OWun4Y04
Просмотров: 624565 SciShow
Biofilm: A New (Gross) Thing to Worry About
 
03:52
Slime can be great, but when it's the wrong kind of slime (you know, the kind that can kill you?), it gets added to the list of things Hank wishes he didn't have to worry about. Scientists call it biofilm, and it's a type of bacterial colony the produces a sticky organic glue which anchors the organisms to each other and to whatever surface they fancy. Like SciShow? http://www.facebook.com/scishow Follow SciShow! http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://dft.ba/-381R
Просмотров: 242480 SciShow
Why Aren't There Giant Insects?
 
03:50
Hank and physiologist Jon Harrison discuss the question of insect size and major theories that attempt to explain why there is a limit to how large insects can get with current conditions on Earth. Like SciShow @ http://www.facebook.com/scishow Follow SciShow @ http://www.twitter.com/scishow References http://www.prehistoric-wildlife.com/species/m/meganeura.html http://www.telegraph.co.uk/earth/wildlife/8930070/Worlds-biggest-insect-...
Просмотров: 1006343 SciShow
The Curiosity Rover Landing
 
03:13
Landing will take place the night of August 5th, 1:30 AM eastern, 10:30 pm pacific, and 6:30 AM GMT (August 6th.) NASA will be streaming live here: http://www.nasa.gov/multimedia/nasatv/index.html And we'll be live-tweeting here: http://www.twitter.com/scishow The Mars Science Laboratory or Curiosity Rover is the largest payload ever delivered to the surface of a planet and it has a terrifyingly complicated descent and landing strategy. First, the atmosphere takes it from 13,000 mph to 2,000 mph. Then a parachute takes it down to 200 mph. The final, powered-descent stage lowers the craft to 21 feet above the surface, at which point it will be lowered by a tether and the rockets will detach and crash land elsewhere. If the Curiosity survives it's descent to Mars, it will be the most robust scientific tool to ever explore another planet. The size of a small car, the craft has a planned mission length of two years, during which time it could travel over 12 miles. Curiosity's goals are to study the geology and climate of Mars, to determine whether there was once life there, and to prepare for future human exploration of the Red Planet.
Просмотров: 739569 SciShow
Why We Age - And How We Can Stop It
 
10:24
Hank hates death, so he helps us understand the process of aging, informs us of how scientists are studying ways to prevent it and brings us the exciting news of current research in longevity... for mice. Like SciShow? http://www.facebook.com/scishow Follow SciShow! http://www.twitter.com/scishow References for this episode can be found in the Google document here: http://dft.ba/-2dUq
Просмотров: 2179551 SciShow