The physicist explained what he finds so terrifying about the prospect of us being alone in the universe ...

Add Yahoo as a preferred source to see more of our stories on Google. Photo Illustration by Erin O'Flynn/The Daily Beast/Ken Crawford/Wikimedia Commons There's a theory that's in vogue in ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Another batch of "UFO Files" have been dropped by the Pentagon, featuring previously classified documents, audio and footage of ...

Scientists say the silence of the cosmos may be explained by the possibility that technological civilisations destroy themselves before they ever become easy to find. The idea draws on research into ...

Discover the latest sightings, and theories about aliens & UFOs. From news about extraterrestrial life, cover-ups, and unexplained phenomena, explore the mysteries of the universe. 'SPACE ODDITY' ...

"Disclosure" has become a cult word. It shouldn't be, since all it means, technically, is to reveal something. But the new wave of alien conspiracy theorists have made "disclosure" into a teasingly ...

Add Yahoo as a preferred source to see more of our stories on Google. A blue-white object spotted during SpaceX's Starship livestream sparked wild alien theories, including claims it was a 'mothership ...

Photo Illustration by Erin O'Flynn/The Daily Beast/Ken Crawford/Wikimedia Commons There's a theory that's in vogue in astrochemistry called "Assembly Theory." It posits that highly complex ...