An ancient Martian system of canyons and valleys could be home to archaic life forms, a ground-breaking scientific paper has found. Scientists investigating the Red Planet’s mind-boggling cave system ...

Fluorescent caves deep below America show how alien life could exist on one of Jupiter's moons, say scientists. The chemistry in Wind Cave, South Dakota, means that, under an ultraviolet (UV) light, ...

Add Yahoo as a preferred source to see more of our stories on Google. Earth not only does not support diverse ecosystems, but it also has places that serve as analogs for other celestial worlds in our ...