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.

I believe the Abominable Snowman may be real. I think there may be something in that.

It was regarded as a responsibility of the BBC to provide programs which have a broad spectrum of interest, and if there was a hole in that spectrum, then the BBC would fill it.

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

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

I'm against this huge globalisation on the basis of economic advantage.

Until humanity manages to sort itself out and get a co-ordinated view about the planet, it's going to get worse and worse.