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 ...

Pulverised technology from collapsed alien civilisations may lie scattered across the solar system, including on the Moon, a new study suggests. The likelihood of advanced aliens living at the same ...