"In high school, I was very good in math and physics. I wasn’t good at much of anything else. Some people are good at a lot of things. I don’t know how they choose what to do. I couldn’t do athletic stuff, I wasn’t artistic, I have no musical ear, and I wasn’t good at writing. So I was pretty narrow in what I could do. I wasn’t thinking, “Can I do science?” I was thinking, “That’s the only thing I can do, so let’s do it.""