"Disclosure Day" director Steven Spielberg has said that his latest film, which sees him return to the topic of UFOs and extra-terrestrial life forms, is "built on a foundation of truth." Few directors have explored onscreen over the years the possibility of life on other planets more thoughtfully than Spielberg,

Add Yahoo as a preferred source to see more of our stories on Google. The "Alien" franchise is an undeniable classic — a staple of the sci-fi/horror genre. The series features humans fighting for their lives as they're pitted against killer aliens with ...