The only way to save a rhinoceros is to save the environment in which it lives, because there's a mutual dependency between it and millions of other species of both animals and plants.

No one will protect what they don't care about, and no one will care about what they have never experienced.

The truth is: the natural world is changing. And we are totally dependent on that world. It provides our food, water and air. It is the most precious thing we have and we need to defend it.

Instead of controlling the environment for the benefit of the population, perhaps we should control the population to ensure the survival of our environment

What humans do over the next 50 years will determine the fate of all life on the planet.

Anyone who believes in indefinite growth on a physically finite planet is either mad or an economist

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

The question is, are we happy to suppose that our grandchildren may never be able to see an elephant except in a picture book?

How could I look my grandchildren in the eye and say I knew what was happening to the world and did nothing.

Bringing nature into the classroom can kindle a fascination and passion for the diversity of life on earth and can motivate a sense of responsibility to safeguard it.

I just wish the world was twice as big and half of it was still unexplored.

Isn't life, ' she stammered, 'isn't life--' But what life was she couldn't explain. No matter. He quite understood.'Isn't it, darling?' said Laurie.

Nothing limits intelligence more than ignorance

Fish rule the waters, but can be caught using worms.Birds rule the air, but can be caught using grain.

No man can rationally live, worship, or love his neighbour on an empty stomach.

We don't really have any kind of regulatory structure at all.

In mathematics and science definition are simple, but bare-bones. Until you get to a problem which you understand it takes hundreds and hundreds of pages and years and years of learning.

No one knows who is listening, say nothing you would not wish put in the newspapers.

Local color has a fatal tendency to remain local; but it is also true that the universal often borders on the void

I really love Steve Martin and all the stuff he did in the '70s. I think it's really great.

I know why the caged bird sings.