Add Yahoo as a preferred source to see more of our stories on Google. Alien Day was this past Sunday (April 26), and to celebrate one of the best sci-fi horror franchises of all time, HBO Max has just ...

Few movies have left such a mark on the sci-fi landscape as Alien and its sequels — and who knows what might have happened had these deleted scenes never hit the cutting room floor?

The best alien invasion movies feature the most exhilarating stories about extraterrestrial visitors, from War of the Worlds to Annihilation.