In this episode, Mike and Chris discuss the mass extinction event that led to the dinosaurs becoming extinct and the mammals filling new niches.  It is now known that an asteroid impacted the Earth about 65 million years ago, the results of which were to block out the sun across the globe for about a decade, leading to a cascade of death, from plants to herbivores to carnivores.  We discuss the evidence for the actual impact event and for the eventual transition of species.

Like us on Facebook to receive updates on episodes and additional content (when we remember to upload some).