One thing that makes the adventure of working in our field particularly rewarding, especially in attempting to improve the theory, is that... a chief criterion for the selection of a correct hypothesis... seems to be the criterion of beauty, simplicity, or elegance.

I do not keep up with the details of particle physics.

Both biological and cultural diversity are now severely threatened and working for their preservation is a critical task.

Bush is a nice fellow who gives very good parties. I just wish someone would find him a better job than running the country.

You know, there was a time, just before I started to study physical science, when astronomers thought that systems such as we have here in the solar system required a rare triple collision of stars

Hugh Everett's work has been described by many people in terms of many worlds, the idea being that every one of the various alternative histories, branching histories, is assigned some sort of reality.

Sustainability is living on nature's income rather than living on its capital.