My mailing address is:
Department of Physics, Caltech 452-48
1200 East California Boulevard, Pasadena, CA 91125
Office: 626/395-6830, Fax: 626/568-8473

The best way to reach me is by email: I usually don't answer my phone, so there's not much point in calling.

I love giving talks to all sorts of audiences. Unfortunately, my schedule doesn't allow me to do nearly as much traveling as I might like to. If you'd like to book a talk, you should contact the BrightSight Group, who handles my speaking engagements. Their email is, or call (609) 924-3060.

For inquiries about my book The Big Picture, contact Liza Cassity at Dutton Books:, or (212) 366-2554.

My book agent is Katinka Matson at Brockman Inc.:, or (212) 935-8900 x200.

If you are interested in becoming a student or postdoc at Caltech, please feel free to contact me by email. I am happy to talk about Caltech, although the actual application process is fairly formalized, depending on what you're applying to be:

Unfortunately, I am not able to help with questions about physics, theories of the universe, and so on. There just isn't enough time. I recommend checking out one of the various online discussion forums devoted to that kind of thing:

Unsolicited compliments, on the other hand, are always welcomed.