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.

It is right that we be concerned with the scientific probity of metaphysics.

I had a teacher in college who drastically changed the course of my life by telling me that he believed in me as an actor. I never received that support before, and it inspired to me to such a degree that I never looked back. He taught me that it's okay to be crappy; it's okay to fight; it's okay to go to any length.

I had quite a scattered childhood. I was Irish in London, because I had my secondary school education there. I never really fitted anywhere. I didn't feel it was a negative thing, and I was never made to feel different - I just knew I was.

I was afraid that science-fiction buffs and everybody would say things like, 'You know, there's no sound in outer space.'