Astrophysicists estimate that any exponentially growing technological civilization has only 1,000 years until its planet will ...

Rather than forming from an ancient collision between Earth and another planet, the moon may have been snatched from another ...

Beyond our solar system, countless alien worlds of lava, ice, water and noxious gas swirl through the cosmos. Here are some ...

Historical markers were once just for American history. But many now claim aliens have visited earth from outer space — and ...

In a recent paper, a prominent philosopher argues that increased belief in alien visitation is fast becoming a widespread ...