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.
44: Atmospheres in our solar system with Dr. Soto
43: The Ice Giants with Dr. Soderlund
42: Finding exoplanets with Dr. Christiansen
41: The last of the “great observatories” with Dr. Storrie-Lombardi
40: Keeping an eye on asteroids with Dr. Yeomans
39: A day in the life of a Mars rover with Dr. Litchtenberg
38: Mysterious icy travelers with Dr. Fernández
37: Exploring Pluto with Dr. Singer
36: Using artwork to explain the Universe with Dr. Hurt
35: Geology at a distance with Dr. Rivkin
34: Keeping track of asteroids with Dr. Sphar
33: Why do we look for water when we look for life? With Dr. Cable
32: How to build a planet with Dr. Kretke
31: If we could put Mars in a bottle… with Paulo Younse
30: Space weathering with Dr. Kaluna
29: Keeping the James Webb Space Telescope cool with Dr. Stone
28: Building experiments for the International Space Station with Dr. White
27: Searching Iceland’s lava fields for life on Mars with Dr. Cable
26: Old, volatile, and gassy: Why comets would make unpleasant but interesting dinner guests with Dr. Bauer
25: Why couldn't New Horizons orbit Pluto?
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