This is the definitive ranking of the best alien invasion movies of all time. In between those bookends, Lifeforce is one of the wildest, most unique, most incredible science fiction movies almost ...

Add Yahoo as a preferred source to see more of our stories on Google. The 21st century has entertained movie fans with some great alien movies. Movies like Arrival, District 9, Prometheus, Avatar, and ...

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 ...

Christopher Willard/Hulu; Bob Penn/Sygma/Sygma via Getty; Newmarket Films/Courtesy Everett Collection Cristin Milioti as Sarah Wilder in 'Palm Springs'; Sigourney Weaver as Ellen Ripley in 'Aliens'; ...