A look at the debate over building a city on the Moon or Mars, covering scientific findings, mission timelines and challenges discussed on the Fiction Science podcast.

Musk’s announcement comes as NASA plans to send four astronauts around the Moon on a crewed flyby in the Artemis II mission scheduled for this year, marking the first crewed deep-space flight in over ...

Taking to X, Musk said SpaceX has already pivoted toward developing a self-growing lunar city, estimating it could be achieved in less than 10 years, compared with 20 years or more for Mars. "The ...