Hearty bacteria in a lab survived pressures comparable to an asteroid strike on the red planet, suggesting a hypothetical scenario in which our planet was seeded with life.

The discovery of Psychrobacter SC65A.3, isolated from the Scărişoara Ice Cave in Romania, is both a blessing and a curse.

While aliens in science fiction hop between planets on vast spaceships, scientists say real-life extraterrestrials might take ...

Aliens exist – they just haven't visited Earth, a NASA veteran has claimed. Dr Gentry Lee has worked at the US space agency since 1968, when he first got involved with the Viking mission to Mars. He ...