Words can be said in bitterness and anger, and often there seems to be an element of truth in the nastiness. And words don't go away, they just echo around.

Certainly, if you look at human behavior around the world, you have to admit that we can be very aggressive.

I've got different ideas of complete happiness. But one is being by myself out in a forest, completely happy. Another is walking with a dog in some nice place. And three is sitting around preferably a fire, but not necessarily, and drinking red wine with friends and telling stories.

It would be absolutely useless for any of us to work to save wildlife without working to educate the next generation of conservationists.

When I go back to Gombe it's to be in that timeless world where it's soft and where life is entwined and you actually see the pattern of nature. I always feel this great spiritual power which I believe is around.

Researchers find it very necessary to keep blinkers on. They don't want to admit that the animals they are working with have feelings.

Chimpanzees can be quite political.