There are all sorts of things flying around the universe that we earthlings haven't yet figured out how to identify.

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. For as long as humans have ...

A Pentagon investigation reveals 'Yankee Blue,' an Air Force ritual that misled cadets into believing they were part of a UFO program, fueling decades of alien myths.