Some of the most important caves, like Lascaux in the Dordogne region in France, have had to be closed down. There had been too many people allowed in, and they left a mold on the walls that is spreading and which can't really be stopped.

Spirit of immersion and curiosity and awe and participation is something which Timothy Treadwell and I have in common.

If the part is really good of course I would like to do it.

We have volcanoes also in our immediate neighborhood. I wish we didn't have to travel that far. Probably the kind of magnitude and awesome raw power of them is very fascinating, and of course it's very cinematic.

But the question that everyone wanted answered was whether I would have the nerve and the strength to start the whole process from scratch. I said yes; otherwise I would be someone who had no dream left, and without dreams I would not want to live.

We have to articulate ourselves. Otherwise we would be cows in the field.

I discover no kinship, no understanding, no mercy. I see only the overwhelming indifference of nature.