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As a new space race heats up, private companies and sovereign nations alike have their sights on setting up permanent human settlements in space – but huge technological, medical and legal challenges remain. Kelly and Zach Weinersmith join us to talk about their book A City on Mars: Can We Settle Space, Should We Settle Space, and Have We Really Thought This Through?

And 2025 brought some exciting extraterrestrial scientific discoveries, including new evidence about the Martian environment and the possibility of past life on Mars, the discovery of important building blocks of life in samples from the asteroid Bennu, and observations of the third interstellar object that’s been documented in our solar system.

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