In this episode of the Cosmos: A Spacetime Odyssey Neil DeGrasse Tyson discusses the smallest components of the Universe. He first talked about Natural vs Artificial selection and then segmented the discussion into how Artificial selection (over millions of years) created all of the biodiversity we see on earth today. I really liked this episode because NDG does a great job explaining these concepts and how selection plays a role in determining genome. He ends the video by talking about how nature resets itself via mass extinction. Overall I enjoyed this episode but I wouldn’t classify it as informative for the Cosmos class.