As human beings, we can encompass a vague feeling of what the universe is, and all in this funny little brain here - so there has to be something more than just brain, it has to be something to do with spirit as well.

I wasn't trying to be a scientist. I only ever wanted to be a naturalist, like a David Attenborough.

Well, in some ways we're not successful at all. We're destroying our home. That's not a bit successful.

People say, "Oh, we ought to fight for animal rights." We fought for human rights, but even if humans have rights, they can still be horribly abused and are every day. You don't have to go to some far off land, far away place; we have a lot of child abuse in our own society.

I'm always pushing for human responsibility. Given that chimpanzees and many other animals are sentient and sapient, then we should treat them with respect.

At some point, my body will collapse. But I hope that my brain will still be working so that I can carry on with writing.

I believe the only hope for mankind lies in the hands of our young people.