I think a major element of jetlag is psychological. Nobody ever tells me what time it is at home.

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

I think we're lucky to be living when we are, because things are going to get worse.

If my grandchildren were to look at me and say, 'You were aware species were disappearing and you did nothing, you said nothing', that I think is culpable. I don't know how much more they expect me to be doing, I'd better ask them.

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

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