You'll find people where their conditions aren't changing in any way, its rather rare for them to be happy.

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

It is that range of biodiversity that we must care for - the whole thing - rather than just one or two stars.

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.

They always mean beautiful things like hummingbirds. I always reply by saying that I think of a little child in east Africa with a worm burrowing through his eyeball. The worm cannot live in any other way, except by burrowing through eyeballs. I find that hard to reconcile with the notion of a divine and benevolent creator.

The fact is that no species has ever had such wholesale control over everything on earth, living or dead, as we now have. That lays upon us, whether we like it or not, an awesome responsibility. In our hands now lies not only our own future, but that of all other living creatures with whom we share the earth.

I suffer much less than many of my colleagues. I am perfectly able to go to Australia and film within three hours of arrival.