Some UFO cases remain difficult to explain, but that is only the beginning of the scientific question. The evidence needed to ...

The question of whether aliens exist is not a new one. In science fiction films and books, people have wondered if we’re the only life in this universe and what that can imply for universes beyond ...

Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

Robert Smith is convinced the aliens have won. "The invasion has happened—it's all over," says the University of Alberta space historian who teaches a course on the history of extraterrestrials. It's ...