We're The Only Ones With Chins - And We Don't Know Why

Check out the first episode of Human: https://to.pbs.org/HumanNOVA You share a trait with every single human who's ever lived – but no other animal on Earth has it. It's not your big brain, or your opposable thumbs... it's actually this little shelf on your face that we call a chin. And here's the thing: we're not totally sure why it exists. ***** PBS Member Stations rely on viewers like you. To support your local station, go to http://to.pbs.org/DonateEons ***** Eons is a production of Complexly for PBS Digital Studios. Super special thanks to the following Patreon patrons for helping make Eons possible: Perseus Bluejay, John Hildebrandt, AllPizzasArePersonal, Hugo van den Hoek, Alex Hackman, Travis Bauer, John H. Austin, Jr., Stephen Patterson, William Sunderland, Karen Farrell, Melodie Chen-Glasser, Casey Hague, Mary Sammartino , rene fuqua, Gizmo, Jason Rostoker, Nicholas Arger, Kerry Conneely, Susan Freund, Mary Tevington, Jonathan Rust, Lea Nisay, Josh L, Eric Younge, Irene Wood, CalamityBangs, Beth K, Elyssa, Derek Helling, Mark Talbott-Williams, Willie, Brian Clubb, Beth-Ann Cheney, John D Elias, Nomi Alchin, A.B. Heckert, Yu Mei, Annemiek Arkema, IAmHere, Duane Westhoff, Hillary Ryde-Collins, Nquiztor, Wookiee Henderson, Albert Folsom, lyric1981, SKS PHD, Eric Edwards, Dan Caffee, Steve Hill, Nathan Paskett, Nick Ryhajlo, Betsy Radley, Jennifer Courtemanche, Stephanie Schlea, Jeff Graham, Ruth Orr, raus , Eric Franklin, Randall George, Walter Ray-Dulany, Lianne Lairmore, Sarah Grunow-Mau, Deanna Hernandez, John Celio, Aaditya Mehta, Kevin Lacson, Christopher Samuel, Collin Dutrow, Steven Kern If you'd like to support the channel, head over to http://patreon.com/eons and pledge for some cool rewards! Want to follow Eons elsewhere on the internet? Facebook - https://www.facebook.com/eonsshow Instagram - https://www.instagram.com/eonsshow/ Bluesky - https://bsky.app/profile/pbseons.bsky.social #Eons References: https://docs.google.com/document/d/16EytpTxZ4pM1Gnuin-nxWdtK_IjBhnuNtl6gTVV20xA/edit?usp=sharing