Every man should pull a boat over a mountain once in his life.

I'm not a one-trick horse.

I am somebody who creates images, with my perspectives, fascinations and my instincts as a narrator. You have to activate the audience's imagination. If you are just giving them scientific results, they would forget the film in five minutes flat.

Do you not then hear this horrible scream all around you that people usually call silence.

It happens sometimes that the material itself carries things you have not fully planned. The footage has its own right, its own life, its own vibrancy and energy in it.

The paintings are not just on flat walls - you have these enormous niches, bulges and protrusions, as well as stalactites and stalagmites. The effect of the three-dimensionality is phenomenal. It's a real drama which the artists of the time understood, and they used it for the drama of their paintings.

Technology has a great advantage in that we are capable of creating dinosaurs and show them on the screen even though they are extinct 65 million years. All of a sudden, we have a fantastic tool that is as good as dreams are.