A century ago, people laughed at the notion that we were descended from monkeys. Today, the individuals most offended by that claim are the monkeys.

We biologists often use the phrase “Mother Nature” to refer to the entire system of Nature that we see around us, but it is not really an entity, and it does not have any real concern for any of its living creatures – it lives on with or without us; it is in our human psychology to impose a human-like identity upon any grand system that we encounter around us – it gives us a sense of closeness to that system and makes us feel an essential part of it. When I say, Mother Nature designed us, or programmed us, I am simply referring to the process of natural selection.

I have sometimes thought that the reason the trees are so quiet in the summer is that they are in a sort of ecstasy; it is in winter, when the biologists tell us they sleep, that they are most awake, because the sun is gone and they are addicts without their drug, sleeping restlessly and often waking, walking the dark corridors of forests searching for the sun.