Your Teeth Went From the Outside In

If you’ve ever experienced dental pain, you've probably wondered why our teeth would evolve to function like an oversensitive alarm system. To find the answer, we have to go way back to when teeth first evolved, as part of the armored skin of ancient fish. ***** 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: Sarah Ellis, tara thara, Mary Sammartino , Nate Chisholm, Yibrán Arumir, John Hildebrandt, Sara Lance, Stephen A Muth III, Melodie Chen-Glasser, Kerry Conneely, Casey Hague, William Sunderland, Susan Freund, Nicholas Arger, Lycoperdon perlatum, Annemiek Arkema, Lea Nisay, Elyssa, Eric Younge, John D Elias, Willie, SKS PHD, Beth-Ann Cheney, IAmHere, Nquiztor, lyric1981, Eric Edwards, Jennifer Courtemanche, Steve Hill, Eric Franklin, raus , Sarah Grunow-Mau, Walter Ray-Dulany, Lianne Lairmore, Ruth Orr, Deanna Hernandez, Douglas B, John Celio, Steven Kern, Kevin Lacson, Collin Dutrow, Christopher Samuel, AllPizzasArePersonal, Karen Farrell, Aaditya Mehta, John H. Austin, Jr., Gizmo, Alex Hackman, Jason Rostoker, Mary Tevington, Brian Clubb, Nomi Alchin, Derek Helling, Irene Wood, CalamityBangs, Duane Westhoff, A.B. Heckert, Hillary Ryde-Collins, Yu Mei, Dan Caffee, Albert Folsom, Nick Ryhajlo, Stephanie Schlea, Betsy Radley, Jeff Graham, Nathan Paskett If you'd like to support the channel, head over to   / eons   and pledge for some cool rewards! Want to follow Eons elsewhere on the internet? Facebook -   / eonsshow   Instagram -   / eonsshow   Bluesky - https://bsky.app/profile/pbseons.bsky... #Eons References: https://docs.google.com/document/d/1W...