We habitually engage in meddling with nature. Until this century most of this meddling was good. Witness the preservation of the European countryside. But since then we've smoked it up and littered it and dumped too much in too many waters. I don't think it's our privilege to behave this way.

...the life of the planet began the long, slow process of modulating and regulating the physical conditions of the planet. The oxygen in today's atmosphere is almost entirely the result of photosynthetic living, which had its start with the appearance of blue-green algae among the microorganisms.

It is in our collective behavior that we are most mysterious.

Cats - a standing rebuke to behavioural scientists . . . least human of all creatures.

There's really no such thing as the agony of dying. I'm quite sure that pain is shut off at the moment of death. You see, something happens when the body knows it's about to go. Peptide hormones are released by cells in the hypothalamus and pituitary gland. Endorphins. They attach themselves to the cells responsible for feeling pain.

It's just plain learning something that you didn't know. There is a real aesthetic experience in being dumbfounded.

We are spectacular splendid manifestations of life. We have language. We have affection. And finally, and perhaps best of all, we have music.