Your film is like your children. You might want a child with certain qualities, but you are never going to get the exact specification right. The film has a privilege to live its own life and develop its own character. To suppress this is dangerous. It is an approach that works the other way too: sometimes the footage has amazing qualities that you did not expect.

If you don't read, you will never be a filmmaker.

I shouldn't make movies anymore. I should go to a lunatic asylum.

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.

You have to be very prudent with what you are doing and what sort of tools you are utilizing. Drones have become a wonderful new tool in filmmaking.

Centuries from now our great-great-great-grandchildren will look back at us with amazement at how we could allow such a precious achievement of human culture as the telling of a story to be shattered into smithereens by commercials, the same amazement we feel today when we look at our ancestors for whom slavery, capital punishment, burning of witches, and the inquisition were acceptable everyday events.

I simply don't like the culture of drugs. I never liked the hippies for it. I think it was a mistake to be all the time stoned and on weed. It didn't look right and it doesn't look right today either and the damage drugs have done to civilizations are too enormous. And besides, I don't need any drug to step out of myself. I don't want them and I do not need them.