For example, how you would introduce a leading character into your film, and as an absolute ingenious example, [Elia] Kazan in his film Viva Zapata!, how he introduces his leading character Marlon Brando into the film. No film ever did it as wonderful as he did it.

Well they are very frightening for me because their stupidity is so flat. You look into the eyes of a chicken and you lose yourself in a completely flat, frightening stupidity. They are like a great metaphor for me... I kind of love chicken, but they frighten me more than any other animal.

In the Chauvet Cave, there is a painting of a bison embracing the lower part of a naked female body. Why does Pablo Picasso, who had no knowledge of the Chauvet Cave, use exactly the same motif in his series of drawings of the Minotaur and the woman? Very, very strange.

I always felt completely confident - it's like in a feature film, knowing your principle character is extremely well-cast. I had that same confidence in Clive [Oppenheimer].

I make films because I have not learned anything else and I know I can do it to a certain degree. And it is my duty because this might be the inner chronicle of what we are. We have to articulate ourselves, otherwise we would be cows in the field.

You are confronted with abysses of time that are, in a way, unfathomable. You see a painting in charcoal of raindeer and it was left unfinished and somebody else finished it. But through radio carbon dating we know that the next one completed the painting 5,000 years later. You're just blown away by the notion of passage of time. We have no relationship to that kind of depth of time.

We haven't seen a real volcanic event at least in 74,000 years - [Mount Toba] in Indonesia, in Sumatra, where the crater itself is 100 kilometers across. It was so monumental, what happened, that for a very long time the entire atmosphere of our planet was darkened. It's not the lava and the heat per se; it's the obscuring of the entire atmosphere, and it made it very difficult for the human race to survive.