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 MCU has had several cool aliens. The Skrulls, the Chitauri, the Abilisk, they all have cool designs and either sharp teeth or interesting powers. But the title of coolest MCU alien is the Flerkens ...