Harvard University

The best compliment I ever received was from my little brother: “My science teacher’s unbelievably good at telling stories,” he announced. “Nearly as good as you.” I thought about that, how I savor a good story the way some people savor last-minute touchdowns. I learned in biology that I’m composed of 7 × 10 27 atoms, but that number didn’t mean anything to me until I read Bill Bryson’s A Short History of Nearly Everything. One sentence stayed with me for weeks: “Every atom you possess has almost certainly passed through several stars and been part of millions of organisms on its way to…