David Attenborough traces the life and career of the anthropologist, Louis Leakey.
Louis Leakey who died in 1972 probably spent more time on his knees than any monk. But he wasn't praying. He was scrabbling in the dust for fossils, for the skulls of apes, the teeth of elephants, the jaws of pigs, the remains of tortoise shells - and, above all, for human bones that would push back our knowledge of man's origin thousands, even millions of years.'
Programme adviser SONIA COLE Producer PETER DE ROSA