Professor of Physics
What He Studies
Particle cosmology—mixing the physics of the very smallest constituents of the universe with the physics of the universe as a whole—and the emergence of complex structures in nature, focusing on very fundamental questions related to what he calls the “three origins”: cosmos, life, and mind.
Recent Articles on Space & Time
Space & Time Experts
In The News
Our understanding of time is a particularly vivid demonstration of how we can usefully describe the same World in multiple ways that are rather starkly different in character and in import for such questions as free will and agency, universe or multiverse, epistemology, and others.
— Big Questions Online
Infinity makes sense mathematically and may even be realized in Nature; but we will never know for sure. However, we can do the next best thing, and see if at least neighboring universes exist.
— 13.7: Cosmos and Culture, NPR
University of California, Santa Cruz
Department of Physics
1156 High Street