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Find Study Hall at What are animal-like fossils doing in rocks a billion years old, and what does that mean for our understanding of their evolution and geologic time itself? Turns out, there might've been a long, slow-burning fuse that ultimately ignited the Cambrian Explosion. ***** PBS Member Stations rely on viewers like you. To support your local station, go to ***** Eons is a production of Complexly for PBS Digital Studios. Super special thanks to the following Patreon patrons for helping make Eons possible: Collin Dutrow, Pope John XII, Steven Kern, Aaditya Mehta, AllPizzasArePersonal, John H. Austin, Jr., Alex Hackman, Amanda Ward, Stephen Patterson, Karen Farrell, Trevor Long, Jason Rostoker, Jonathan Rust, Mary Tevington, Bart & Elke van Iersel - De Jong, Irene Wood, Derek Helling, Mark Talbott-Williams, Nomi Alchin, Duane Westhoff, Hillary Ryde-Collins, Yu Mei, Albert Folsom, Heathe Kyle Yeakley, Dan Caffee, Nick Ryhajlo, Jeff Graham If you'd like to support the channel, head over to and pledge for some cool rewards! Want to follow Eons elsewhere on the internet? Facebook - Twitter - Instagram - #Eons References:
