Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life.

An alien invasion might sound like pure science fiction, but a scientist has now revealed what the terrifying consequences of this encounter might be.

Aliens could, in theory, reach Earth but would never truly go home again, according to physicists who say Einstein's laws of ...

By studying Earth's toughest microbes and complex animal "speech", scientists are reshaping how we search for – and may someday talk to – alien life.