Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

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

Forget Hollywood: aliens should look as different to us as we do to bananas, saysdeGrasse Tyson ...

Holidaymakers have one major thing in common with scientists who are on the hunt for alien life: their plans are often thwarted by clouds. The clouds on alien worlds are such a long-standing issue – ...