Richard Leakey

I would hazard a guess that we have found fossilized human remains of at least a thousand different specimens in South and East Africa, more or less complete at that. I think this is where the prelude to human history was primarily played out.

When we began filming, these people had legs, but as we were filming, they had been injured and they were brought to the hospital to have their legs amputated, and that's where we found them and asked them to come and be part of the film.

Computers and computing are all around us. Some computing is highly visible, like your laptop. But this is only part of a computing iceberg. A lot more lies hidden below the surface. We don't see and usually don't think about the computers inside appliances, cars, airplanes, cameras, smartphones, GPS navigators and games.