Harvard scientist Avi Loeb claims the interstellar object 3I/ATLAS may be alien technology sent to seed life on Earth, sparking a debate with sceptics who insist it is merely a comet.

Astronomers thought they had seen the "first hints of life on an alien world" this year, but they disappeared under closer ...

It's one of life's biggest questions - are we alone in the universe? Now, one of Britain's top space scientists has declared ...

Life on Earth had to begin somewhere, and scientists think that “somewhere” is LUCA—or the Last Universal Common Ancestor.