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

Some scientists believe the sheer number of stars, planets and potentially habitable environments in space makes ...

For the believers and nonbelievers, the Pentagon answered whether UFOs or aliens have ever visited Earth, saying there is no evidence. Pentagon press secretary Maj. Gen. Pat Ryder fielded several ...

With the release of "Disclosure Day," Steven Spielberg's new film about aliens, a question as old as science fiction itself resurfaces: If aliens were to arrive on Earth, would they come to conquer us ...