I like animals. I like natural history. The travel bit is not the important bit. The travel bit is what you have to do in order to go and look at animals.

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.

Morality is temporary, wisdom is permanent.

She holds secretsthat would break spinesyet she carries them so well.

I'm a hundred-and-one years old and at my age, honey, I can say what I want!

Preparing for death is one of the most empowering things you can do. Thinking about death clarifies your life.

All too often, a successful new business model becomes the business model for companies not creative enough to invent their own.

To be sure, nothing is more important to the integrity of the universities . . . than a rigorously enforced divorce from war-oriented research and all connected enterprises.

Memory is not what the heart desires. That is only a mirror, be it clear as Kheled-zaram. Or so says the heart of Gimli the Dwarf.

We're also more affected by aspirational signals in an offline world where it is more difficult to "hide" and thus indirectly increases the influence from others.

The sound of story is the dominant sound of our lives.

Thou art as wise as thou art beautiful