There's a lot about sleep that we don't understand, like why we even sleep in the first place, for example. Here are some amazing discoveries biologists have made while trying to solve the mystery of sleep. Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: 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: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: rarediseases.info.nih.gov/diseases/6429/fatal-familial-insomnia www.nejm.org/doi/full/10.1056/NEJM198610163151605 www.nytimes.com/2001/05/06/magazine/3-case-study-fatal-familial-insomnia-location-venice-italy-to-sleep-no-more.html www.sciencedirect.com/science/article/pii/016643289500020T Brain activity link.springer.com/article/10.1007%2Fs12576-015-0414-3 jnnp.bmj.com/content/74/1/9 science.sciencemag.org/content/81/2111/597 Brain centers link.springer.com/article/10.1007%2Fs12576-015-0414-3 psycnet.apa.org/psycinfo/1932-00279-000 www.sciencedirect.com/science/article/pii/S0361923006000463 Memory www.sciencedirect.com/science/article/pii/S0149763414002474 www.ncbi.nlm.nih.gov/pmc/articles/PMC5020097/ www.ncbi.nlm.nih.gov/pmc/articles/PMC3768102/ Healing www.ncbi.nlm.nih.gov/pubmed/16120095 www.ncbi.nlm.nih.gov/pubmed/9456469 www.sciencedirect.com/science/article/pii/S0306987711002234?np=y www.ncbi.nlm.nih.gov/pmc/articles/PMC1299128/ Pain www.uni-bamberg.de/fileadmin/uni/fakultaeten/ppp_professuren/physiologische_psychologie/Publikation/sleepmedicinereviews.pdf www.ncbi.nlm.nih.gov/pubmed/25915149 www.ncbi.nlm.nih.gov/pubmed/216974 www.ncbi.nlm.nih.gov/pubmed/176677 Blue light www.scientificamerican.com/article/q-a-why-is-blue-light-before-bedtime-bad-for-sleep/ www.ncbi.nlm.nih.gov/pubmed/23509952 www.pnas.org/content/112/4/1232 Dishwasher www.ncbi.nlm.nih.gov/pmc/articles/PMC3551275/ www.ncbi.nlm.nih.gov/pubmed/24199995 Ancestors www.ncbi.nlm.nih.gov/pubmed/26654373

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