Some humans are mathematicians-others aren't.

I was the sort of person who didn't care about hairdressing and clothes and parties and boyfriends. I really wanted to be in the wild.

I was even accused of teaching the chimps how to fish for termites which I mean that would have been such a brilliant coup.

Studying chimps, I came to the conclusion that being evil is something that only humans are capable of. A chimp would never plan to pull another's nails out. The chimps' way of aggression is quick and brutal. I compare them to gang attacks.

Change happens by listening and then starting a dialogue with the people who are doing something you don't believe is right.

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

We're the ones who can make a difference. If we lead lives where we consciously leave the lightest possible ecological footprints, if we buy the things that are ethical for us to buy and don't buy the things that are not, we can change the world overnight.