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b'T-Rex is having an identity crisis. Rocking the world of paleontology is the claim that Rex was not one species, but actually three. It\\u2019s not the first time that this particular dino has forced us to revise our understanding of the past. The discovery of the first T-Rex fossil in the 19th century taught humanity a scary lesson: species eventually go extinct. If it happened to this seemingly invincible apex predator, it could happen to us too.\\nHear how the amateur fossil hunter Barnum Brown\\u2019s discovery of T-Rex changed our understanding of ourselves, and the epilogue to the dinosaur era: how our mammalian relatives survived the potential extinction bottleneck of an asteroid impact.\\nGuests:\\nThomas Carr\\xa0- Vertebrate paleontologist and Professor of Biology, Carthage College\\nPeter Makovicky\\xa0- Vertebrate paleontologist and Professor of paleontology in the Department of Earth and Environmental Sciences at the University of Minnesota\\nDavid Randall\\xa0- Author of \\u201cThe Monster\\u2019s Bones: The Discovery of T Rex and How It Shook Our World\\u201d\\nSteve Brusatte\\xa0- Personal Chair of Paleontology and Evolution, University of Edinburgh. Author of \\u201cThe Rise and Fall of the Dinosaurs\\u201d and, most recently, \\u201cThe Rise and Reign of The Mammals\\u201d\\nFeaturing music by\\xa0Dewey Dellay\\xa0and\\xa0Jun Miyake\\nBig Picture Science is part of the\\xa0Airwave Media\\xa0podcast network.\\xa0Please contact\\xa0sales@advertisecast.com\\xa0to inquire about advertising on Big Picture Science.\\nYou can get early access to ad-free versions of every episode by joining us on\\xa0Patreon. Thanks for your support!\\n\\xa0\\nLearn more about your ad choices. Visit megaphone.fm/adchoices'