Scientists may have just taken one of the biggest steps yet in the search for life beyond Earth. Meet K2 18 b, a distant ...

A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

"Eventually, our own Voyager spacecraft will be extraterrestrial artifacts in other stellar systems." ...

Avi Loeb, a Harvard astronomer who has made headlines with his theories about alien encounters, will lead a White House ...

WASHINGTON (AP) — A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the White House to lead a team of outside scientists to study the national security ...

Space exploration was a major theme of a state House hearing on Tuesday, even as the budget deadline looms over lawmakers.

Somewhere in the Mojave Desert, a gleaming white dome sits in the middle of nowhere, and the story behind it is stranger than ...