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 ...

An unusual sighting in a NASA image has reignited speculation that something extraterrestrial once existed on Mars.

The Harvard astrophysicist has devoted years—and thousands of interviews—to the idea that mysterious objects streaking ...

WASHINGTON (AP) — A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the White ...

Scientists in a recent breakthrough have discovered vast hidden magma systems beneath the surface of Mars, marking an “unexpected discovery” leading the researchers closer to finding ...

God and aliens are having a moment. But what do Christianity and other faiths really teach about ETs?

An interstellar comet that blazed past the sun and swung by Earth last year could be nearly three times older than our solar ...

Astrobiologists think extraterrestrial civilisations grow so much that they hit crisis points, missing the chance to set out ...

Is the rest of the cosmos a pristine environment awaiting the arrival of humanity’s “post-human” descendants? Or is advanced ...

The claim that their loved ones’ deaths and disappearances are linked is almost certainly false — but the loss remains real. Elizabeth Weiss, an anthropologist whose husband, Nick Pope, a prominent ...