The U.S. government finally admits to the existence of UFOs. See more in this clip from "Aliens and the United States." ...

If life exists elsewhere, it might not be on worlds like Earth. Here are some of the more peculiar places scientists are ...

Why are the Japanese so puzzling?Are the Japanese aliens? Of course, that cannot be the case. The Japanese are human beings, ...

Seven decades after the first reported sightings of Unidentified Flying Objects, a scientific council is investigating ...

One of the greatest mysteries of life is whether we are alone in the cosmos. The laws of probability suggest we aren’t, but despite centuries of searching, we have never seen any clear evidence of ...

Add Yahoo as a preferred source to see more of our stories on Google. One of the greatest mysteries of life is whether we are alone in the cosmos. The laws of probability suggest we aren't, but ...

Where are all the aliens? We've yet to find life outside of that on Earth, but that doesn't mean scientists aren't looking. In fact, the search for extraterrestrial intelligence is going strong, and ...

Steven Spielberg has long made movies about aliens, like 'Close Encounters of the Third Kind' and 'Disclosure Day', now ...

PM on February 23, 1975. In Kamimachi, Kofu City, Yamanashi Prefecture, two second-grade boys looked up at an orange light on ...

Professor Brian Cox has said that if intelligent life is as rare as he suspects, humanity could extinguish meaning across a galaxy of 400 billion suns, and that he finds the prospect terrifying. Brian ...