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Videos uploaded by user “SciShow” for the 2012
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
Views: 1177333 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
Views: 1095940 SciShow
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
Views: 913319 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
Views: 538076 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
Views: 580543 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
Views: 1785351 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
Views: 1720661 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
Views: 752296 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
Views: 1614852 SciShow
Why Sex?
 
04:53
Hank gets into why sex is the preferred method of reproduction for most species - and it's not for the reasons you're thinking. 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/-2ACF
Views: 942246 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
Views: 1293479 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/
Views: 1026931 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-...
Views: 996480 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
Views: 717805 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
Views: 472511 SciShow
Vestigial Structures
 
04:20
Hank talks about some of the structures in our bodies that are "leftover" from previous evolutionary phases of humanity. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow Sources: http://www.newscientist.com/article/mg19826562.100-vestigial-organs-remnants-of-evolution.html Coccyx: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1571308/figure/fig05/ http://www.livescience.com/11317-top-10-useless-limbs-vestigial-organs.html http://en.wikipedia.org/wiki/Vestigial
Views: 476976 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
Views: 551161 SciShow
The Oldest, Most Distant Object in the Universe Discovered
 
03:00
Hank reports on the discovery by NASA scientists of the most distant, oldest galaxy ever observed. Like SciShow on Facebook! http://www.facebook.com/scishow Follow SciShow on Twitter! http://www.twitter.com/scishow References and image licenses for this episode: http://www.nasa.gov/mission_pages/hubble/science/distance-record.html http://www.nasa.gov/images/content/706976main_p1236a-8x10-macsj0647-m.jpg http://en.wikipedia.org/wiki/File:Gravitational_lens-full.jpg
Views: 416998 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]
Views: 445524 SciShow
Why Sexy Is Sexy
 
03:29
Hank delves into the scientific reasons behind why we are attracted to the people we're attracted to. It's complicated. 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/-3by3
Views: 4921129 SciShow
Helium
 
03:53
Hank talks about everyone's favorite squeaky-voice gas and why it's important for more than party balloons. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow For further reading: "U.S. government agencies work to minimize damage due to helium-3 shortfall," Toni Feder, Physics Today October 2009, page 21 http://www.physicstoday.org/resource/1/phtoad/v62/i10/p21_s1?isAuthorize... "Nation's helium reserve running on empty?" Leslie Tamura, Washington Post, Oct.11, 2010 http://education.jlab.org/itselemental/ele002.html
Views: 531349 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
Views: 1725840 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
Views: 159126 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/
Views: 1201374 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
Views: 409066 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
Views: 1587106 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
Views: 2756270 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
Views: 561053 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
Views: 446447 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
Views: 998601 SciShow
Alfred Wegener: Great Minds
 
04:55
Hank introduces us to Alfred Wegener, a voraciously curious guy who proposed the original theory of continental drift - and was laughed at for it. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow Sources: http://www.is.wayne.edu/mnissani/PAGEPUB/HISTORY.HTM http://pubs.usgs.gov/gip/dynamic/historical.html http://www.ucmp.berkeley.edu/history/wegener.html http://pubs.usgs.gov/gip/dynamic/wegener.html http://earthobservatory.nasa.gov/Features/Wegener/wegener_7.php http://www.pbs.org/wgbh/aso/databank/entries/bowege.html Images: http://en.wikipedia.org/wiki/File:Wegener_Alfred_signature.jpg http://www.ucmp.berkeley.edu/tectonics/crustages.jpg http://en.wikipedia.org/wiki/File:Plates_tect2_en.svg http://en.wikipedia.org/wiki/File:Snider-Pellegrini_Wegener_fossil_map.gif http://areology.blogspot.com/2011_01_01_archive.html http://the-moon.wikispaces.com/Wegener http://upload.wikimedia.org/wikipedia/commons/1/16/Wegener_Expedition-1930_008.jpg
Views: 440875 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
Views: 1871933 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
Views: 407927 SciShow
Gold: The Big Bling
 
03:31
Hank talks about a shiny element that has fascinated humans for millenia. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow For more: http://ircamera.as.arizona.edu/NatSci102/NatSci102/lectures/supernovae.htm http://www.valdosta.edu/~cbarnbau/astro_demos/stellar_evol/evol_3.html
Views: 650371 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
Views: 429872 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]
Views: 1372392 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/
Views: 759095 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
Views: 197913 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
Views: 544313 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
Views: 821816 SciShow
Human Parasites
 
09:05
Hank tells us about all of the things that live on us or in us - the good, the bad, and the very, very ugly. 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/-2CkS
Views: 1366060 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
Views: 519645 SciShow
Electric Airplanes for the Future!
 
02:13
Hank tells us the outcome of the 2011 Green Flight Challenge and tells us why electric airplanes are the future of air travel. Follow SciShow on Twitter: http://www.twitter.com/scishow Like SciShow on Facebook: http://www.facebook.com/scishow
Views: 390174 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
Views: 532442 SciShow
Prions: The Real Zombie-Makers
 
04:53
Hank is tired of zombies in popular culture, and while acknowledging that dead people are scary (especially if they start moving around), he brings us some information on prions - misfolded proteins that are responsible for destroying brains and get passed around mostly by getting eaten. So yeah, zombie stuff. 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/-2jtJ
Views: 857061 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
Views: 495263 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
Views: 2115561 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
Views: 300277 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
Views: 277102 SciShow
Nikola Tesla: Great Minds
 
09:14
Hank brings us the tale of the bizarre and eccentric genius with the crazy eyes who spent his life increasing awesome wherever he went, and contributed in some way to pretty much every cool invention you can think of. Nikola Tesla spoke eight languages and, at the time of his death, held over 700 patents and was being investigated by the US government for claiming to have invented a 60 million volt death ray. Tesla was an undisputed genius, and SciShow gold. Like SciShow! http://www.facebook.com/scishow Follow SciShow http://www.twitter.com/scishow References: http://www.pbs.org/tesla/ll/index.html http://www.teslauniverse.com/nikola-tesla-timeline-1856-birth-of-tesla http://rinf.com/alt-news/sicence-technology/tesla-proven-right-as-technology-is-transmitted-wirelessly/ http://www.badassoftheweek.com/tesla.html This video uses the following sounds from Freesound.org: "Tesla ascending-m.wav" by Rmutt
Views: 1138972 SciShow