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

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.

If I can make programmes when I'm 95, that would be fine. But I would think I'll have had enough by then.

It never really occurred to me to believe in God.

Life is not all high emotion. Some of the most interesting things are when its not highly emotional: little details of relationships and body language.

No one will protect what they don't care about, and no one will care about what they have never experienced.

I'm not a propagandist, I'm not a polemicist; my primary interest is just looking at and trying to understand how animals work.