Daniel and Kelly talk about how santa takes solves an NP-hard problem, how reindeer fly and glow, and the physics of lamps that defy time.

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Daniel and Kelly answer questions from curious listeners, about big black holes, nuking hurricanes and the philosophy of photons.

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Daniel and Kelly chat with Mary Roach about her latest book (Fuzz), and how she goes about getting the incredible stories that appear in her books.

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Daniel and Kelly dig into the surprisingly controversial question of why airplanes stay in the air.

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Daniel and Kelly talk to Daniel Abrahams and Ty Franck, the authors behind The Expanse series.

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Daniel and Kelly talk about the surprisingly difficult task of finding the fuel to make fusion work on Earth

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Daniel and Kelly chat with Dr. Martin Elvis about the promise and perils of space resources.

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Daniel and Kelly give our US-based listeners some things to gobble about over Thanksgiving dinner other than politics.

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Daniel and Kelly answer questons about dark energy, slime molds and Hawking radiation!

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Daniel and Kelly talk to Dr. Volker Rudolf about cannibalism. 

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Daniel and Kelly talk about difficulties encountered during polar expeditions, and how we can avoid making these same mistakes when we begin exploring Mars. 

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