0:00
14:38
There’s a theory that all of us have a maximum number of friendships that we can maintain – 150, to be exact. Suspiciously exact, really, if you think about it.
See omnystudio.com/listener for privacy information.
More episodes from "Stuff You Should Know"
Don't miss an episode of “Stuff You Should Know” and subscribe to it in the GetPodcast app.