What happens when you don't sleep? And why do we need to do it anyways? Hank explains the science of sleep: the cause, the benefits, and who holds the record for going without it! Like SciShow? Want to get cool things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: dftba.com/artist/52/SciShow Or help support us by subscribing to our page on Subbable: subbable.com/scishow -- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Thanks Tank Tumblr: thankstank.tumblr.com Thumbnail credit: Mark Sebastian Sources for this episode: healthysleep.med.harvard.edu/healthy/science/what/characteristics healthysleep.med.harvard.edu/healthy/matters/benefits-of-sleep/why-do-we-sleep faculty.washington.edu/chudler/chasleep.html www.sleepfoundation.org/article/how-sleep-works/animals-sleep-there-human-connection www.bbc.co.uk/science/humanbody/sleep/articles/whatissleep.shtml healthysleep.med.harvard.edu/image/200 www.nhahealth.com/science.htm blogs.discovermagazine.com/crux/2012/05/14/is-the-purpose-of-sleep-to-let-our-brains-defragment-like-a-hard-drive/#.UeOA_tLvsuc phys.org/news/2011-02-why-do-we-sleep.html www.ncbi.nlm.nih.gov/pmc/articles/PMC3385863/ www.sciencenews.org/sn_arc97/5_24_97/fob2.htm harvardmagazine.com/2005/07/deep-into-sleep.html health.howstuffworks.com/mental-health/sleep/basics/why-do-we-sleep.htm www.scientificamerican.com/article.cfm?id=how-long-can-humans-stay www.indiana.edu/~p1013447/dictionary/sleepdep.htm www.sciencenews.org/view/generic/id/348604/description/News_in_Brief_Sleep_loss_affects_gene_activity www.sciencedaily.com/releases/2009/12/091215160900.htm science.howstuffworks.com/life/inside-the-mind/human-brain/sleep1.htm www.pbs.org/wnet/brain/episode3/sleep/ ngm.nationalgeographic.com/2010/05/sleep/max-text www.sleepfoundation.org/article/sleep-topics/melatonin-and-sleep discovermagazine.com/2006/oct/why-we-sleep#.UeLzwdLvsuc harvardmagazine.com/2005/07/deep-into-sleep.html