Like the lead character of “Project Hail Mary,” some scientists are proposing ways that life might exist beyond a star’s ...

If we're to find extraterrestrial life in the universe, astronomers have pinpointed the best places to look for it. They have ...

Alien planets are far away but extreme lasers on Earth are giving scientists a way to investigate what they're like.

A former NASA developer has analyzed 1950 photographic plates showing nine unexplained objects in Earth's orbit, years before ...