I don't approve of sunbathing, and it's bad for you.

The nature of human beings is that they'd far rather face the disaster that is happening tonight than the one that is happening tomorrow.

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.

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.

How could I look my grandchildren in the eye and say I knew what was happening to the world and did nothing.

Climate change will affect the whole of humanity, while terrorist attacks will only affect a small section of humanity. Of course, you wouldn't say that if you were related to someone who had been beheaded or blown up or murdered.