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

I don't even think of chimps as animals. I think of them as beings.

I never wanted to give up. I thought I might have to. Especially at the beginning when chimpanzees had never seen a white person before.They gave one look at me and ran away! They were scared, but eventually I got their trust.

I learnt from Flo how to be mother. Flo was patient, tolerant. She was supportive. She was always there. She was playful. She enjoyed having her babies, as good mothers do.

The greatest danger to our future is apathy.

A sense of calm came over me. More and more often I found myself thinking, "This is where I belong. This is what I came into this world to do.

Some humans are mathematicians-others aren't.