It poses no risk to Earth, according to NASA.

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

The next major search for extraterrestrial intelligence might involve putting Moon dust under a microscope rather than pointing a radio telescope toward the stars. A new study led by SETI Institute ...

While the comet's precise point of origin remains unclear, the NASA scientists said they believe it hails from a solar system older than our own, which formed about 4.5 billion years ago.

A former Pentagon UFO investigator claims the U.S. has recovered alien spacecraft and non-human bodies (i.e. alien ...