mars

Five rovers have driven on Mars over 30 years. They've found water, organic molecules, and possibly biosignatures. Here's what each rover discovered and what's coming next.

Terraforming Mars has been a science fiction dream for decades. The actual physics suggests it's vastly harder than commonly imagined, and a 2018 NASA-funded study concluded it's basically impossible with current or near-future technology.

Two questions decide whether Mars can ever be a real second home: can we re-engineer the planet, and can the human body survive years of radiation and low gravity? The science on both is more sobering than the pitch decks suggest.

Artemis is NASA's plan to return humans to the Moon — for the first time in over 50 years — and use it as a stepping stone to Mars. Here's how the program works and what's next.