Movies about disasters—natural or human-made—have been produced since the earliest days of film. As early as 1916, a disaster with an extraterrestrial cause was touted in The End of the World, a ...

Alien, Blade Runner, and Children of Men are among the all-time best R-rated hard sci-fi movies.

Movies that center on the battles fought by members of the military certainly have their place, but sometimes it's more fun to see what (albeit, fictional) soldiers might do against an alien combatant ...