Who is the oldest primate, and is it our great-great-great grandfather? Listener Elena's question takes us into a laboratory chock full of fossils, and brings us back to the impact that killed most of the dinosaurs. Anthropologist Chris Kirk introduces us to our very ancient - and very tiny - ancestors.

Visit our blog at tumblepodcast.com to see photos of Rooneyia and Mahgarita, as well as a tour of the Vertebrate Paleontology Lab! We have resources to get started with your own fossil hunt. If you've been inspired to fossil hunt, let us know what you found!

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