For over six decades, the Search for Extraterrestrial Intelligence (SETI) has been tirelessly scanning the cosmos for signs ...

Documents might help scientists shed light on unexplained phenomena and government secrets, experts said.

Scientists hunting for extraterrestrial life believe alien civilisations may indeed be attempting to contact Earth, but ...

There are things the NASA chief has "come across in the job that he can’t explain," but aliens are not among them.