That people will object very much to seeing a predator killing its prey, and yet, in the news, will accept showing shots of people shooting one another.

I am an ardent recycler. I would like to think that it works. I don't know whether it does or not.

I suppose happiness is something one enjoys, but I suspect that happiness is not a state but rather a transition.

There are some four million different kinds of animals and plants in the world. Four million different solutions to the problems of staying alive.

I think we're lucky to be living when we are, because things are going to get worse.

I can mention many moments that were unforgettable and revelatory. But the most single revelatory three minutes was the first time I put on scuba gear and dived on a coral reef. It's just the unbelievable fact that you can move in three dimensions.

It's a moral question about whether we have the right to exterminate species.