These Creatures Were Darwin's Greatest Enemy

Video Description

They may not look like much, but beneath that shell lies an evolutionary mystery - one that stumped the biggest names in natural history for over a hundred years. ***** PBS Member Stations rely on viewers like you. To support your local station, go to http://to.pbs.org/DonateEons ***** Produced by Complexly for PBS Digital Studios Super special thanks to the following Patreon patrons for helping make Eons possible: Melanie Truscott, Michael Roy, John H. Austin, Jr., Kate Huhmann, Alex Hackman, Amanda Ward, Stephen Patterson, Karen Farrell, Trevor Long, Raphael Haase, daniel blankstein, Roberto Adrian Ramirez Flores, Jason Rostoker, Jonathan Rust, Mary Tevington, Bart & Elke van Iersel - De Jong, William Craig II, Irene Wood, Derek Helling, WilCatRhClPPh33, Mark Talbott-Williams, Nomi Alchin, Duane Westhoff, Hillary Ryde-Collins, Yu Mei, 4th_phase, Jayme Coyle, Albert Folsom, Oscar Amoros Huguet, Patrick Wells, Dan Caffee, Stephanie Tan, Nick Ryhajlo, Sean Dennis. 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 Twitter - https://twitter.com/eonsshow Instagram - https://www.instagram.com/eonsshow/ References: https://docs.google.com/document/d/1QvrArb8uWrccvk6GcxutSSijK3iFjL8XhgWyrRBfKic/edit?usp=sharing