There are two ways to be rich: to have more or need less. It's estimated that we squander about 30 percent of our energy leaving the lights on, the refrigerator door open, and so on. Then there is the enormous amount of food that we expend huge amounts of energy to raise and then throw away.

The theory of evolution was not formally published until shortly before Faraday's death. Evolution was yet to be discovered during Faraday's life. Also, I don't think that Michael Faraday would claim that the Earth is extraordinarily young.

If you meet somebody who says he or she has never dreamed of flying, I don't believe you. I mean, they're lying.

Winter lingered so long in the lap of Spring that it occasioned a great deal of talk.

The US Navy has several people on every ship that can navigate by the stars. They don't fool with that.

The debate [in Undeniable] was nominally about creationism as a "viable" explanation for what we observe around us. For my side, the debate went very well; I'm not sure what I would change, although I can imagine shortening my answers during the rebuttals, perhaps.

If the Earth gets hit by an asteroid, it's game over. It's control-alt-delete for civilization.