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

A top scientist has suggested that aliens may be 'terrified of Earth' not because of humanity, but due to a bizarre cosmic phenomenon known as time dilation, which could leave any interstellar visitor ...

Aliens could, in theory, reach Earth but would never truly go home again, according to physicists who say Einstein's laws of relativity turn any near‑light‑speed visitor into a 'time exile.' The ...

Between government document dumps and a Spielberg movie about extraterrestrial life, it’s a good week to believe in aliens. It’s also a good week to reality-check that belief. About a third of the ...

Potatoes have featured in sightings before, and in real and fictional space travel. By Danny Hakim This is Danny Hakim’s first story on flying potatoes. The giant potato was sighted at 9:35 a.m.

Scientists say extraterrestrial life may exist elsewhere in the universe, but vast distances, enormous energy requirements and Earth's unique environment make alien visits to Earth highly unlikely.

How were the pyramids built? Who created the crop circles? Well, History Channel’s successful show, Ancient Aliens, offers their theories about the topics. The show has been running since 2009 and has ...

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

Avi Loeb is leading a new Science Advisory Council tasked with finding the origin of unidentified objects spotted by military pilots and others. It's part of a broader White House effort studying ...