I think a major element of jetlag is psychological. Nobody ever tells me what time it is at home.
I like animals. I like natural history. The travel bit is not the important bit. The travel bit is what you have to do in order to go and look at animals.
Before the BBC, I joined the Navy in order to travel.
I'm absolutely strict about it. When I land, I put my watch right, and I don't care what I feel like, I will go to bed at half past eleven. If that means going to bed early or late, that's what I live by. As soon as you get there, live by that time.
I mean, it is an extraordinary thing that a large proportion of your country and my country, of the citizens, never see a wild creature from dawn 'til dusk, unless it's a pigeon, which isn't really wild, which might come and settle near them.
Well, I'm having a good time. Which makes me feel guilty too. How very English.
I just wish the world was twice as big and half of it was still unexplored.
My last trip was to the States, and on the way back I sat in the cockpit for take-off and landing. In a funny way, I think aircrew know that I've travelled a lot and therefore feel we are fellow professionals to some degree-which is nice, very complimentary.