Long before scientists discovered that other stars in the universe host their own planetary systems, humanity had ...

The controversial Harvard astronomer is one of the main sources of the "alien mothership" hypothesis. This is what he thinks, ...

The hunt for intelligent life beyond Earth has quietly entered a more exacting phase, and one small, cool star has become a ...

For more than a century, popular culture has trained us to picture extraterrestrials as bug-eyed, bipedal “little green men” ...

If there's one thing 'Star Trek' loves, even in times of peace, it's a scrap between Starfleet and the Klingons.