Photo: Jessica Barthel

Ever wonder why it feels like you can’t live without your friends? LYDIA DENWORTH ’88’s new book, Friendship: The Evolution, Biology, and Extraordinary Power of Life’s Fundamental Bond (Norton & Co.) explains why. Denworth discusses her scientific examination of friendship on PAWcast, our monthly podcast. 

“Friendship is as important to your health as diet and exercise,” says Denworth. “The rate at which your cells age, literally, is affected by your levels of social connection. So you need to pay attention. You need to plan your day accordingly.” 

LISTEN to the full interview at