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, ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

This means that, instead of the volcanic caves previously associated with Mars’ volcanic activity, these newly discovered pits are more likely to have been created by the interaction of water with the ...