I would be absolutely astounded if population growth and industrialisation and all the stuff we are pumping into the atmosphere hadn't changed the climatic balance. Of course it has. There is no valid argument for denial.

I'm not an animal lover if that means you think things are nice if you can pat them, but I am intoxicated by animals.

I had a huge advantage when I started 50 years ago - my job was secure. I didn't have to promote myself. These days there's far more pressure to make a mark, so the temptation is to make adventure television or personality shows. I hope the more didactic approach won't be lost.

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

It's a moral question about whether we have the right to exterminate species.

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.

The correct scientific response to something that is not understood must always be to look harder for the explanation, not give up and assume a supernatural cause.