No barrier stands between the material world of science and the sensibilities of the hunter and the poet.

It often occurs to me that if, against all odds, there is a judgmental God and heaven, it will come to pass that when the pearly gates open, those who had the valor to think for themselves will be escorted to the head of the line, garlanded, and given their own personal audience.

Ninety-nine percent of all species that ever lived are now extinct.

Destroying a tropical rainforest for profit is like burning all the paintings of the Louvre to cook dinner.

Jehovah had nothing to say to Moses and the others about the care of the planet. He had plenty to say about tribal loyalty and conquest.

Go as far as you can, [young scientists]. The world needs you badly.

Let us see how high we can fly before the sun melts the wax in our wings.