Daniel and Kelly talk about what Vibrio cholerae does to your body, and the methods we have to combat it. They also talk about some of the really bad methods we tried using in the past. Like, real bad.

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Daniel and Kelly dive into the history of medicine, and discuss the data John Snow collected to argue that cholera is transmitted through contaminated water and not foul-smelling air. These data bolstered the emerging germ theory of disease.

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Daniel and Kelly answer questions about tongue worms, units, and Kelly's nightmares.

Link: Standard reference peanut butter

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Daniel and Kelly explore the structure of the space between solar systems and reveal our cosmic context.

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Daniel and Kelly talk about the challenges of hot fusion and the frustrated potential of cold fusion. And Keanu Reeves.

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Daniel and Kelly answer questions about the expanding universe, how sleep aids impact sleep quality, and what characteristics might make aliens better adapted for interstellar travel.

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Daniel and Kelly welcome Dr. Scott Solomon back on the show to talk about his new book Becoming Martian: How Living in Space Will Change our Bodies and Minds.

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Daniel and Kelly discuss Elon Musk's recent announcement that SpaceX has shifted focus from a self-sustaining settlement on Mars to a self-growing city on the Moon.

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Daniel and Kelly answer questions about how it can both be true that humans share 98.7% of their DNA with bonobos and that fraternal twins share 50% of their DNA, why black holes don't have color charges, and whether or not you could treat a fever or let it ride.

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Daniel and Kelly revel in the amazing multiplicity of moons in our solar system and what they reveal about our cosmic history.

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