Of all the various subgenres attached to the sci-fi domain, alien invasion flicks come off as timeless favorites. Here are five of the very best.

Add Yahoo as a preferred source to see more of our stories on Google. As the Alien franchise heads into new territory -- both thematically and format..ily -- with the TV series Alien: Earth, we're ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The first movie, directed by Ridley Scott, follows a crew of scientists who work for a company called ...