You'll discover in countries where women have control over their own bodies, where they have education, where they have birth control, where they have facilities and where they are literate, when those things happen, the birth rate falls.

Can a growing human population still leave space for wildlife?

I'm not a propagandist, I'm not a polemicist; my primary interest is just looking at and trying to understand how animals work.

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

Crying wolf is a real danger.

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

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