In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.

Scientists have uncovered compelling evidence that humans reached New Guinea and Australia around 60,000 years ago—earlier ...

Discover how space affects human health, from microgravity and cosmic radiation to psychological isolation, and what it means ...

Whether it involves a trip to the moon, the sun, or problem solving when the trajectory to a destination doesn’t work out, or ...

The assemblage suggests that the ancestors of some of today's animal groups may have arisen before the famed Cambrian ...

Ridley Scott's 'Alien' began a horror franchise that centers around one woman's aim to defend the galaxy against space ...

Discover 25 bizarre creatures you never knew roamed the Earth! From ancient sea monsters to modern deep-sea oddities, explore ...