I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include quantum mechanics, gravitation, cosmology, statistical mechanics, and foundations of physics, with occasional dabblings elsewhere. My most recent book, Something Deeply Hidden, is about quantum mechanics, Many Worlds, and the emergence of spacetime. I host a podcast, Mindscape, where I interview smart people about all sorts of interesting ideas.

My official titles are Research Professor of Physics at Caltech and External Professor at the Santa Fe Institute. I live in Los Angeles with my lovely wife, writer Jennifer Ouellette.