The universe in some sense must have known that we were coming.

Climate change is part of the normal order of things, and we know it was happening before humans came.

It is characteristic of all deep human problems that they are not to be approached without some humor and some bewilderment.

The great advances in science usually result from new tools rather than from new doctrines.

We cannot hope to either understand or to manage the carbon in the atmosphere unless we understand and manage the trees and the soil too.

In the history of science it has often happened that the majority was wrong and refused to listen to a minority that later turned out to be right.

The Ph.D. system was designed for a job in academics. And it works really well if you really want to be an academic, and the system actually works quite well. So for people who have the gift and like to go spend their lives as scholars, it's fine. But the trouble is that it's become a kind of a meal ticket - you can't get a job if you don't have a Ph.D.