Many individuals are doing what they can. But real success can only come if there is a change in our societies and in our economics and in our politics.

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

I've never actually met one in the wild, but I have seen a king cobra. They go towards people, they rear up six feet tall and they're very aggressive and they are very fast. And one bite means certain death. So if I encountered a king cobra in the wild I would be very alarmed.

Dealing with global warming doesn't mean we have all got to suddenly stop breathing. Dealing with global warming means that we have to stop waste, and if you travel for no reason whatsoever, that is a waste.

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

The World is full of wonders, but they become more Wonderful, not less Wonderful when Science looks at them.

I remember when we were in the World Cup in Australia and I had to win the singles against Tony Payne, best of seven legs, to win it. I was 2-0 down but ended up beating him I suffer much less than many of my colleagues. I am perfectly able to go to Australia and film within three hours of arrival.