From lava tubes on Mars to ice pockets on Europa, subterranean environments may offer the best chance of finding life—and living safely—beyond our planet. “I was like, ‘OK, I'm pretty sure that ...

Curiosity rover’s discovery of a diverse set of organic molecules in a Mars rock sample strengthens evidence that the planet once had the chemistry needed to support life.

NASA's Curiosity rover has photographed extraordinary spiderweb-like formations on Mars that scientists believe could hold the key to ancient life on Mars ...

The planet Mars is the most thoroughly surveyed celestial body aside from Earth itself. Generations of space probes and rovers like Curiosity have collected images and material samples of the red ...