Welcome to Scientific American’s Science Talk, posted on September 24^th, 2019. I’m Steve Mirsky. On this episode:

FARMELO CLIP

That’s physics historian Graham Farmelo. Long-time listeners may recall hearing him talk about his Paul Dirac biography, The Strangest Man, and the subsequent Churchill’s Bomb, about the early British efforts to develop a fission bomb. His latest book is The Universe Speaks in Numbers, about the relationship between physics and mathematics. A symposium on the subject took place recently at Princeton’s Institute for Advanced Study. I caught up with Graham after the symposium.

FARMELO SEGMENT

That’s it for this episode, get your science news at our website, www.scientificamerican.com. Where you can read the article in the new issue of Scientific American, the October issue, by Ellen Rupel Shell, A New Theory of Obesity. It examines the role of ultraprocessed foods in the obesity epidemic.

And follow us on Twitter, where you’ll get a tweet whenever a new item hits the website. Our twitter name is @sciam. For Scientific American’s Science Talk, I’m Steve Mirsky, thanks for clicking on us.