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.

Neil deGrasse Tyson is an astrophysicist who is the director of the Hayden Planetarium at the American Museum of Natural ...

Former Republican congressman Matt Gaetz has made some startling claims that he received a briefing on a classified alien-human "hybrid-breeding program." Gaetz delivered the astonishing statement ...