I try to be after something that is deeply reverberating inside of our souls, some deep echo from - even from prehistory. What makes us humans? How do we communicate? Where are we going at this moment? Something for an audience where they can step outside of themselves, where they can be almost like in ecstasy of truth, some sort of deep illumination. And that's what I'm trying in documentaries and in feature films.

[ Digital revolution ] only has allowed me to work faster, editing digitally, which I'm doing right now, a film on volcanoes. I can edit almost as fast as I'm thinking, editing with celluloid means always searching for this little reel of film, and number it, and scribble on it with some sort of pens, and gluing it together, and working on a flatbed. It's much, much slower.

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.

We were very, very lucky [with Tim White filmed making historic discoveries in the East African Rift ] . In 100 years, only three skeletal remains [of early man] were ever found at this site. This was the third one, and we were right there when it happened. In fact, when I first heard they had found something, I said, "Please stop it! Don't do anything right now. Let's do it tomorrow until we have unpacked our cameras and assembled our stuff.

I function better in the jungle in Amazonia or Antarctica or Alaska or the Sahara desert. An artificial environment like a studio has never attracted me. I could work in a studio, but I would never really feel at home.

There's a completely new culture out there. I'm not a participant of texting and driving - or texting at all - but I see there's something going on in civilization which is coming with great vehemence at us.

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