Friendship is one of the most important components and predictors for emotional and physical well being. A good friendship can last a lifetime, but it’s never too late to make new friends, as long as we devote time and energy to that effort. As we re-engage with one another after a year of isolation, who will we choose to interact with, and why does hanging out with our friends feel so good? On this week’s “Life Examined,” science journalist and author Lydia Denworth explains the science and evolution behind friendship and what primates can teach us about the value of social bonds. She says that “a good friendship is as important to our health as diet and exercise.” We’ll also hear from journalist Kate Murphy about why the pandemic has provided us with a useful opportunity to drop the friends that drain and drag you down.