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

One difference between ants and humans is that while ants send their old women off to war, humans send their young men.

The search for knowledge is in our genes. It was put there by our distant ancestors who spread across the world, and it's never going to be quenched.

The human race is not divided into two opposing camps of good and evil. It is made up of those who are capable of learning and those who are incapable of doing so.

We should not knowingly allow any species or race to go extinct. And let us go beyond mere salvage to begin the restoration of natural environments, in order to enlarge wild populations and stanch the hemorrhaging of biological wealth. There can be no purpose more enspiriting than to begin the age of restoration, reweaving the wondrous diversity of life that still surrounds us.

I think history has shown that the worst way to [try to] bring people over and actually change public opinion is by insult and applied degradation of them.

[P]rescientific people... could never guess the nature of physical reality beyond the tiny sphere attainable by unaided common sense. Nothing else ever worked, no exercise from myth, revelation, art, trance, or any other conceivable means; and notwithstanding the emotional satisfaction it gives, mysticism, the strongest prescientific probe in the unknown, has yielded zero.