Only 6.6% of surveyed astrobiologists agreed that scientists had probably found extraterrestrial life on exoplanet K2-18b.

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 ...

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 ...

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

NASA's hunt for alien life may be undermined by its own instruments, according to a group of leading astrobiologists who warn ...