Nature isn't positive in that way. It doesn't aim itself at you. It's not being unkind to you.

The most extraordinary thing about trying to piece together the missing links in the evolutionary story is that when you do find a missing link and put it in the story, you suddenly need all these other missing links to connect to the new discovery. The gaps and questions actually increase - it's extraordinary.

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

I would love to go and see the Himalayan Mountain Kingdoms. There are very few left now. I would loved to have gone to Tibet and Nepal. And there are still parts of central Asia that are utterly unexplored.

I just wish the world was twice as big and half of it was still unexplored.

If we were all to reduce our demands for energy, it would make an enormous amount of difference.

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