The fundamental issue is the moral issue.

You know, it is a terrible thing to appear on television, because people think that you actually know what you're talking about.

Birds are the most popular group in the animal kingdom. We feed them and tame them and think we know them. And yet they inhabit a world which is really rather mysterious.

If you watch animals objectively for any length of time, you're driven to the conclusion that their main aim in life is to pass on their genes to the next generation.

I'm luckier than my grandfather, who didn't move more than five miles from the village in which he was born.

An understanding of the natural world and what's in it is a source of not only a great curiosity but great fulfillment...

Clearly we could devastate the world... as far as we know, the Earth is the only place in the universe where there is life. Its continued survival now rests in our hands