The universe is vast and teeming with stars – but if intelligent life exists, it may not be able to visit Earth.

A physicist has argued that fundamental cosmic constraints make visits from alien civilizations to Earth effectively impossible. Factors such as vast interstellar distances, the speed of light as a ...

Barack Obama's insisting the USA doesn't have little green men or alien spaceships locked up in an underground bunker somewhere ... but, if they ever visit Earth, he's volunteering to lead the ...

President Donald Trump said he will direct the release of government files related to alien and extraterrestrial life and unidentified aerial phenomena, saying there is "tremendous interest" in the ...

Delivering a refreshing fusion of science, pop culture, history, and esoteric humor, renowned astrophysicist, lecturer, and best selling author Neil deGrasse Tyson takes us on a whirlwind tour of UFO ...