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

All our environmental problems become easier to solve with fewer people and harder - and ultimately impossible to solve - with ever more people.

No, not a feminist. I'm a humanist. I'm neither one side nor the other.

Apart from anything else, I am designed by evolution, like we all are: if we see a little thing like that, big eyes, tiny nose, we go 'aaah'. That's what evolution does. We are programmed to do that. So to find babies the most amazing, isn't surprising, I don't think.

The only acceptable way to solve ecological problems is if you can persuade people to have fewer children. In the Victorian times, there were families of 15 children. Someone like Edward Lear, he was the last of 21 children. And so what we have to think about is offering people the alternative choice. And in the West, that's what's happening. The birth rate has been dropping steadily and still is. I'm wanting human beings to be better off so they don't view children as an insurance for the future.

London has fine museums, the British Library is one of the greatest library institutions in the world... It's got everything you want, really.

I often get letters, quite frequently, from people who say how they like the programmes a lot, but I never give credit to the almighty power that created nature.