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.
143: Telescope robots with Dr. Ramirez
142: The biggest clock with Rob Seaman
141: Eyes on the back of your head with Dr. Tholen
140: A brand new telescope with Dr. Kartaltepe
139: The missing mantle problem with Dr. DeMeo
138: Transiting Exoplanets with Dr. Payne
137: Documenting rapid change with Dr. Carey
136: Would sailboats work on Titan? With Dr. Soto
135: Linking asteroid observations with Dr. Holman
134: Spinning stars with Dr. Rebull
133: Al Pacino, Robert De Niro, and Mercury with Dr. Padovan
132: Introducing people to the reach of infinity with Tim Thompson
131: Inside the red planet with Dr. Daubar
130: Quantum entanglement with Dr. Ghose
129: A new type of galaxy with Dr. Mutlu-Pakdil
128: Sleeping on a Glacier with Dr. Koppes
127: Black hole pairs with Dr. McGurk
126: Supercities of the Universe with Dr. Connor
125: Oceans, oceans everywhere with Dr. Keane
124: Searching Antarctica for meteorites with Dr. Cohen
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