You know it when you feel it: your pulse races, your cheeks flush, your stomach flips. You can't stop thinking about someone, and when you see them, you can't think straight. You're in love.
But what's actually going on when you fall for someone? How does it affect your brain? Or your heart? And what happens when that love ends?
In Curiosity's Science of Love series, we're investigating what happens to your mind and body when you fall in love (and out of it). Plus, science-backed tips for a happy relationship.