Film director Ridley Scott, who delights in terrifying moviegoers with his cinematic blend of horror and science fiction, suggested in a recent interview that the scary prospect of belligerent invading aliens might transcend the realm of sci-fi. According to Scott, hundreds of alien species are "out there" on distant worlds, and Earth's inhabitants should prepare for the worst if they ever decide to visit our planet. One scientist, though, says that Scott's information about such hostile, and abundant, aliens is off-base and unsupported. Scott told Agence France-Presse (AFP) about his belief in "superior beings," while fielding questions about his latest movie, "Alien: Covenant," opening in theaters in the U.S. on May 19. He warned that any extraterrestrial travelers who are technologically advanced enough to show up on our doorstep would likely be very intelligent and very hostile. And unlike the scenarios that dominate movies — if we go toe-to-toe with these invaders, we probably