Elon Musk has turned a long-running joke about being an extraterrestrial into a central part of his public persona, even as he argues that humanity may be the only intelligent life in the universe.

Add Yahoo as a preferred source to see more of our stories on Google. Is it the invasion of the genome snatchers? Just in case the idea of aliens walking around in human skin suits wasn't frightening ...

Add Yahoo as a preferred source to see more of our stories on Google. (Photo by BRENDAN SMIALOWSKI/AFP via Getty Images) A new genetic study claims alien DNA could be inserted into humans. Dr. Max ...

Jay Stratton claims Roswell alien survivors refused food before dying, but official US investigations have found no evidence ...