This bit of news just makes me happy. Not because the scientific advance is so critical (it’s an important advance, and will have significant practical applications, but that isn’t what I like about it) but because, despite having a really stressful and high-level day job, Steve Chu is still relaxing by going into the lab and doing science. And publishing papers in Nature. It’s nice to see that you can still make time for the things you love doing the most, no matter where you end up in your career.