Add Yahoo as a preferred source to see more of our stories on Google. On social media, one fan wrote: “For a half-century, every new Steven Spielberg release has always felt like a must-see event.

It's a big universe out there, and while we're all for exploring it, a specific subgenre of science fiction movies has hinted that it might be a bad idea. Alien invasion movies have come in droves ...

The sci-fi genre has been home to some incredible movies about war -- usually with invaders from space -- and these five are ...