Dr. Bill Bottke stops by the show to talk about ancient craters on the Moon and Earth. He tells us about how you can figure out crater ages by looking at the nearby rocks, and how that led him and his colleagues to figure out that the impact rate on Earth changes with time.
220: Walking on the roof of hell with Prof. Stanley
219: Breaking the models with Dr. Merrison
218: Anything we try is new with Dr. Cable
217: A beautiful experience with Dr. Villanueva
Bonus: Carrie's research update
216: Right and wrong theories in planetary science with Prof. McKinnon
215: Naming asteroids with Dr. Williams
214: Astronauts on the moon with Dr. Denevi
213: The Six with Loren Grush
212: A scientific legacy with Dr. Blaney
211: The Sparkler Galaxy with Prof. Mowla
Bonus episode: The upcoming American total solar eclipse
210: Wonders of the Night Sky with Prof. Prinja
209: Mission to the largest moon in the solar system with Dr. Witasse
208: Cosmic tug of war with Dr. Plazas Malagón
207: One of the stranger surfaces in the solar system with Dr. Cartwright
206: Every asteroid observation ever taken with Dr. Veres
205: The moon's right to exist with Dr. Prem
204: Light Pollution with Kelly Beatty
203: 11 hours and 23 minutes with Dr. Chabot
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