Before the BBC, I joined the Navy in order to travel.

One in eight plant species face extinction.

In the Baboon community, it is not how strong you are that is important, but who you know that counts

The reverse side of the coin in having this extraordinary ability to go anywhere, is that no one anywhere is remote any more.

I suspect that happiness is not a state but rather a transition.

You've got to be fairly solemn [about the environment]. I mean the mere notion that there are three times as many people on Earth as there were when I started making television. How can the Earth accommodate them? When people, including politicians, set their faces against looking at the consequences-it's just unbelievable that anyone could ignore it.

Steve Irwin did wonderful conservation work but I was uncomfortable about some of his stunts. Even if animals aren't aware that you are not treating them with respect, the viewers are.