While aliens in science fiction hop between planets on vast spaceships, scientists say real-life extraterrestrials might take ...

How far away aliens might detect life on Earth.

Scientists identify exoplanet candidate HD 137010 b, a possible Earth-size world orbiting a Sun-like star 146 light-years away ...

Being able to spot the Earth, let alone any signs of life on our planet, would require an enormous telescope from 66 million ...

Aliens exist - they just haven't visited Earth, NASA veteran Dr Gentry Lee has claimed.

Are aliens real? The question has animated conspiracy theories for decades and enthralled at least one former president of the United States. In a recent interview, Barack Obama became the first ...

There were schools of thought in Ancient Greece that speculated about extraterrestrial life, in trying to answer questions ...

For Bill Diamond, the president and chief executive of the Search for Extraterrestrial Intelligence Institute (Seti) in ...

Documents might help scientists shed light on unexplained phenomena and government secrets, experts said.

There's a definite buzz going around this month about aliens from other worlds, or hadn't you noticed? Former US President ...