Frances Arnold: Since I became an engineer, and there’s no Nobel Prize for engineering, it wasn’t on my radar — although I am at Caltech, where ten percent of the faculty has Nobel Prizes. It’s not a rare event around here. I know people who have Nobel Prizes, but it wasn’t really on my radar. And the reason is that I went into science to become a researcher — and I did it at age 30 — because I finally found something that I enjoyed to do every day. We don’t work for prizes, most people. Most scientists work for the joy of inventing and discovering that we do every day. And that’s why I feel so lucky that I have this opportunity to work with young people, to invent things, to do things that I hope will help the planet. And if a prize comes along, that’s nice, too. But that’s just icing on the cake.