We now know that the structure of the DNA in humans and chimpanzees differs by only just over one percent. You could even have a blood transfusion from a chimp, provided you have the same blood group.

Anyone who tries to improve the lives of animals invariably comes in for criticism from those who believe such efforts are misplaced in a world of suffering humanity.

A chimp would never plan to pull another's nails out.

It's up to us to save the world for tomorrow: it's up to you and me.

In a very unscientific statement, I feel that there's been a disconnect between this clever brain and the heart.

You cannot share your life with a dog, as I had done in Bournemouth, or a cat, and not know perfectly well that animals have personalities and minds and feelings.

Lasting change is a series of compromises. And compromise is all right, as long your values don't change.