It is the tension between creativity and skepticism that has produced the stunning and unexpected findings of science.

Observation: I can't see a thing. Conclusion: Dinosaurs.

Our ancestors lived out of doors. They were as familiar with the night sky as most of us are with our favorite television programs.

The visions we offer our children shape the future. It _matters_ what those visions are. Often they become self-fulfilling prophecies. Dreams are maps.

We humans look rather different from a tree. Without a doubt we perceive the world differently than a tree does. But down deep, at the molecular heart of life, the trees and we are essentially identical.

You mustn't think of the Universe as a wilderness. It hasn't been that for billions of years," he said. "Think of it more as... ..cultivated.

There are many hypotheses in science which are wrong. That’s perfectly all right: it’s the aperture to finding out what’s right. Science is a self-correcting process.