I've always been more interested in organisms that can move on their own than in stationary plants. But when I canoe or hike along the edge of lakes or oceans and see trees that seem to be growing out of rock faces, I am blown away. How do they do it?

The failure of world leaders to act on the critical issue of global warming is often blamed on economic considerations.

The future doesn't exist. The only thing that exists is now and our memory of what happened in the past. But because we invented the idea of a future, we're the only animal that realized we can affect the future by what we do today.

If America wants to retain its position as a global power, its president must listen to the people and show strong leadership at this turning point in human history.

I need quite a lot going on, so a perfect holiday for me is one in a cooler climate with wonderful scenery, animals or great architecture.

I like every individual editor, designer, marketing and publicity person I deal with, but I don't like what publishers, corporately, are doing to the ecology of the book world. It's damaging, and it should change.

We've evolved from sitting back on our tripods and shooting wildlife films like they have been shot historically, which doesn't work for us.

When my parents were divorced in the late '70s, early '80s, the climate was that you should screw over your ex as much as possible - get the worst lawyer in the world, all that. That's not what people are out to do anymore. It feels cruddy to try and destroy each other just because you're breaking up.