With the release of Disclosure Day, Steven Spielberg’s new film about aliens, a question as old as science fiction itself ...

A leading biological anthropologist has proposed that the mysterious beings behind countless UFO sightings could be time-travelling humans from Earth's future, returning to monitor their ancestors as ...

Astrophysicist Neil deGrasse Tyson says humans should think seriously about how they would respond to extraterrestrial life—though not because he believes it is imminent. Newly released U.S.