Why are video games addictive?

Aliens! Zombies! Tiny guys with big mustaches who can jump super high! Video games let you immerse yourself in new and fantastic worlds. But why is it so hard to stop playing, once you’ve started? We asked science journalist Christina Couch to help us find the answer.

Got a question that won’t stop replaying in your brain? Send it to us at BrainsOn.org/contact, and we’ll find an answer that’s a real game changer.