The picture's pretty bleak, gentlemen... The world's climates are changing, the mammals are taking over, and we all have a brain about the size of a walnut.

Humans have changed ecosystems more rapidly and extensively than in any comparable period of time in human history, largely to meet rapidly growing demands for food, fresh water, timber, fiber and fuel. This has resulted in a substantial and largely irreversible loss in the diversity of life on Earth.

I never liked my own species. On why so many of his comics are about animals, in an interview.

I get a couple cups of coffee into me and weird things just start to happen.

You know those little snow globes that you shake up? I always thought my brain was sort of like that. You know, where you just give it a shake and watch what comes out and shake it again. It's like that.

A long time ago, I became aware that many of us have a tendency to lump nature into simplistic categories, such as what we consider beautiful or ugly, important or unimportant. As human a thing as that is to do, I think it often leads us to misunderstand the respective roles of life forms and their interconnectedness.

The great thing about this jungle of ours is that anyone of you could grow up to be Lord of the apes.