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

Being evil is something that only humans are capable of.

Terrorism is usually fueled by poverty, and the fanatical faith of the terrorists who truly believe that the more people they kill who do not subscribe to their faith, the greater their reward in heaven.

I think the most important thing is to keep active, and to hope that your mind stays active.

We find animals doing things that we, in our arrogance, used to think was "just human".

I urge you to read Eternal Treblinka and think deeply about its important message.

The least I can do is speak out for the hundreds of chimpanzees who, right now, sit hunched, miserable and without hope, staring out with dead eyes from their metal prisons. They cannot speak for themselves.