From the Greys to the Nordics, these aliens appear frequently across abduction stories and science fiction tales.

Could humans spread Earth life beyond our planet? Astrobiologists explain where extremophiles might survive and why the risks ...

Scientists now believe life may be found on the notoriously inhospitable planet of Venus – but they believe it will have come ...

Thus far, our search for extraterrestrial life points toward Clarke’s former point, suggesting that our little blue dot is ...

Extraterrestrial visitors are not only already here – they are landing in a top secret “alien airport” hidden away in the ...

The long-running series in which readers answer other readers’ questions comes up with an epic extraterrestrial playlist for Earth’s first contact from beyond the stars ...