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

When you meet chimps you meet individual personalities. When a baby chimp looks at you it's just like a human baby. We have a responsibility to them.

My mother always taught us that if people don't agree with you, the important thing is to listen to them. But if you've listened to them carefully and you still think that you're right, then you must have the courage of your convictions.

Chimps taught us we're not separated from the animal kingdom, we're a part of it.

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

Primates are very territorial. It is in their nature to protect their food resources as well as their females and young.

A good mother is protective but not over-protective. She's patient, she's affectionate, she's playful, but above all she is supportive.