PBS Member Stations rely on viewers like you. To support your local station, go to http://to.pbs.org/DonateEons ↓ More info below ↓ Our DNA holds evidence of a huge, ancient pandemic, one that touched many different species, spanned the globe, and lasted for more than 15 million years. The paper we discuss throughout the episode: Diehl, W., Patel, N., Halm, K. and Johnson, W., 2016. Tracking interspecies transmission and long-term evolution of an ancient retrovirus using the genomes of modern mammals. eLife, 5. https://elifesciences.org/articles/12704 Produced in collaboration with PBS Digital Studios: null Super special thanks to the following Patreon patrons for helping make Eons possible: Julie Cohen, salsablog.band, Michael Hof, Sean C. Kennedy, Eric Roberto, Rodriguez, Hillary Ryde-Collins, Facts Dinosaurs, Frida, YaBoiSam36, Matthew Donnelly, Yu Mei, Colleen Troussel, Dan Ritter, faxo, Gary Walker, Amanda Straw, Stephanie Tan, Laura Sanborn, simon read, Minyuan Li, Ben Cooper, Leonid, Robert Noah, Matt Parker, Heathe Kyle Yeakley, Jerrit Erickson, Anton Bryl, MissyElliottSmith, Zachary Spencer, Stefan Weber, Andrey, Ilya Murashov, Merri Snaidman, Gabriel Cortez, Marcus Lejon, Robert Arévalo, Todd Dittman, Betsy Radley, Anthony Callaghan, Philip Slingerland, John Vanek, Eric Vonk, Henrik Peteri, Jon Monteiro, James Bording, Miles Chaston, Michael McClellan, Jeff Graham, Maria Humphrey, Daisuke Goto, Gregory Kintz, Chandler Bass, Tsee Lee, Robert Hill 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/10q8Hv-q4Yp4dl1SX68IU23n73bgFma1I4de1Sttg7bg/edit?usp=sharing