"Eventually, our own Voyager spacecraft will be extraterrestrial artifacts in other stellar systems." ...

A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

A set of protocols telling scientists what to do – and what not to do – if they ever detect evidence of intelligent life ...

The nature of space, time and the evolution of life on Earth mean it’s unlikely extraterrestrial life has visited our home ...

Project Hail Mary, Solaris, and The Hitchhiker's Guide to the Galaxy are all among the very best sci-fi books set in space.

A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the Trump administration to ...

The question of whether humanity is alone in the universe has fascinated scientists for generations, but few have pursued an ...

Left to Right: Steven Yeun in "Nope," the alien in Steven Spielberg's "E.T." and Scarlett Johansson in "Under the Skin" (Universal Pictures / A24) It didn’t take long for stories about ...

The Great Filter theory suggests advanced civilisations may self-destruct before contacting others, explaining the universe's ...