Good friends like to think they’re on the same wavelength. They aren’t wrong.

Besties laugh at the same jokes, like the same movies and hate the same people. And underlying all these likes and dislikes, close friends also share strikingly similar neural activity while thinking about them. Researchers at Dartmouth College analyzed brain scans of close friends and found that their brains tend to respond to the world in similar ways.

As a next step, researchers want to see if it’s possibl