folks, this is a long one. Luke talks about his Roman Empire: the Chicxulub Asteroid that killed the dinosaurs. it's a scripted episode (don't get used to it) chronicling 3 separate stories: the asteroid impact and its aftermath that killed the dinosaurs, the lives of some of those dinosaurs 66 million years ago, and the modern story of how the asteroid impact hypothesis became scientific consensus.

a list of sources appears at the end of the episode, go get mad at them if you don't like the way the narrative is presented