Add Yahoo as a preferred source to see more of our stories on Google. Man sees a strange object in the sky UFOs have become almost inseparable from the idea of aliens, but science treats those two ...

Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more interesting when you examine what the evidence can actually establish.

The Pentagon has released another batch of ‘UFO Files’ with footage of unknown objects in the sky—here are the most common alien theories, explained. This voice experience is generated by AI. Learn ...

Disclosure Day builds toward one huge question: should humanity finally learn that aliens are real? By the end of the film, that secret can no longer be hidden, as Margaret Fairchild and Daniel risk ...