How Vertebrates Got Teeth... And Lost Them Again

As revolutionary as teeth were, they would go on to disappear in some groups of vertebrates. But why? ***** PBS Member Stations rely on viewers like you. To support your local station, go to http://to.pbs.org/DonateEons ***** Produced by Complexly for Digital Studios Super special thanks to the following Patreon patrons for helping make Eons possible: Katherine Harriger, Karen Farrell, Trevor Long, Brett Clark, Raphael Haase, Lyndsey McGill, daniel blankstein, DY Corty, Ric, Casper Lubbers, Enya, Berenice Castro Huguez, Jason Rostoker, Jonathan Rust, Avery Sanford, Mary Tevington, Bart & Elke van Iersel - De Jong, Kip Obenauf, Jules Martineau, William Craig II, Tracey, James Dowling-Healey, Irene Wood, Derek Helling, Margaret Luby, WilCatRhClPPh33, Mark Talbott-Williams, Nomi Alchin, Michael Hof, Eric Roberto Rodriguez, Hillary Ryde-Collins, Frida, Yu Mei, Dan Ritter, 4th_phase, Jayme Coyle, Oscar Amoros Huguet, Patrick Wells, Aziza Ashling, GrowingViolet, Stephanie Tan, Nick Ryhajlo, Sean Dennis, John Pollock, Ben Cooper, Leonid, Robert Noah, Matt Parker, Heathe Kyle Yeakley, Jerrit Erickson, Anton Bryl, MissyElliottSmith, Zachary Spencer, Stefan Weber, Andrey, Merri Snaidman, Gabriel Cortez, Marcus Lejon, Todd Dittman, Betsy Radley, Anthony Philip Slingerland, John Vanek, Eric Vonk, Jon Monteiro, James Bording, Miles Chaston, Michael McClellan, Jeff Graham, Daisuke Goto, Gregory Kintz, Chandler Bass, Tsee Lee, Robert Hill 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   Twitter -   / eonsshow   Instagram -   / eonsshow   References: https://docs.google.com/document/d/1t...