So, let’s say the worst happens, and Earth gets invaded by aliens. Not the friendly kind offering galactic peace treaties, but the laser-zapping kind.

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, ...

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 ...

Student Jacqueline Heggen showing off glowing formations within Wind Cave. (Joshua Sebree via SWNS) By Stephen Beech Fluorescent caves deep below America show how alien life could exist on one of ...