Before the BBC, I joined the Navy in order to travel.

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.

The greatest victory is the conquest soul.

The bond (of marriage) became the bondage itself

Courage sometimes skips a whole generation

I didn't leave Africa, I left Nigeria, and for political reasons. But ... I've never, never left Africa, and I certainly never left what it means to be Ibo. That is something you carry with you.

... the Kindle is a "roach motel" device: its license terms and DRM ensure that books can check in, but they can't check out.

The strongest guard is placed at the gateway to nothing. Maybe because the condition of emptiness is too shameful to be divulged.

The process depends on the situation, and I don't think there are any two songs that have gone exactly the same way... well, actually, that's not true.

I am the Raskolnikov of jerking off – the sticky evidence is everywhere!

Consider all the past as nothing, and say, like David: Now I begin to love my God.

Print some money and give it to us for the rain forests.