Lecture 23: The Probability of (Intelligent) Life in the U
Lecture 22: Worlds Beyond our Solar System
Lecture 21: Extreme Environments on Earth and in the Solar
Lecture 20: Human impacts: Megafaunal Extinctions to Globa
Lecture 19: Human Innovation: From Tools to Consciousness
Lecture 18: Climate Change from the Cambrian to the Ice Ag
Lecture 17: Comets, Asteroids, & the Death of Dinosaurs
Lecture 16: The Evolution of Complex Life on Earth
Lecture 15: From the Big Bang to Habitable Planets
Lecture 14: What the Universe is Made of