"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 ...

A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the Trump administration to ...

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

NASA’s James Webb Space Telescope has detected a carbon-rich atmosphere on a tiny world orbiting a dead, rapidly spinning ...

A rare visitor from another star system has undergone one of the most extensive technosignature searches ever conducted on an ...

Australia's space agency said there's a completely rational, albeit cosmic, explanation behind the mysterious orbs that ...

The discovery bemused residents of a small town in northeastern Australia. The objects appear to be junk from a space launch, ...

Findings from a mysterious remote chain of islands off the coast of California are rattling bones in the science community as ...

Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

The Manhattan district attorney’s office said it secured the return of dozens of ancient artifacts in June, after a process ...