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: 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: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: www.nature.com/news/oldest-homo-sapiens-fossil-claim-rewrites-our-species-history-1.22114 www.nature.com/nature/journal/v546/n7657/full/546212a.html www.nature.com/nature/journal/v546/n7657/full/nature22336.html www.nature.com/nature/journal/v546/n7657/full/nature22335.html www.nature.com/news/oldest-ancient-human-dna-details-dawn-of-neanderthals-1.19557 www.nature.com/nature/journal/v531/n7595/full/nature17405.html anthro.palomar.edu/homo2/mod_homo_4.htm www.ncbi.nlm.nih.gov/pubmed/22658331 journals.plos.org/plosone/article?id=10.1371/journal.pone.0024024 anthro.palomar.edu/homo2/mod_homo_5.htm www.thoughtco.com/luminescence-dating-cosmic-method-171538 ---------- Images: commons.wikimedia.org/wiki/File:CIA_WorldFactBook-Political_world.pdf www.flickr.com/photos/ideonexus/4698383548/in/photolist-8a8diF-8abrJU-8abt2f commons.wikimedia.org/wiki/File:Crane1.png commons.wikimedia.org/wiki/File:Sahara_dust_plume_Nov_1998.jpg

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