"People and apes share an ancestor. In common parlance, we are descended from the apes. But evidence that we share almost all our DNA with chimpanzees and gorillas has forced a rethink. Not only is our common ancestor much more recent - four million years instead of twenty - but the whole story might be backwards. A four-million-year-old man ape walked upright. So why did apes return to the trees, while humanity strode on? Can a one per cent difference in DNA account for human civilization? John Gribbin and Jeremy Cherfas tell the most compelling detective story in science - the story of where we came from."--BOOK JACKET.

1. One Per Cent Human -- 2. The Evolutionary Clockwork -- 3. The Traditional Timescale: Grandfather's Clock -- 4. Modern Times: the Molecular Clock -- 5. The Rules of the Game -- 6. Monkeys to Men -- 7. The Ape's Brainchild -- 8. People of the Ice -- 9. Talk to the Animals: Brother Esau -- 10. The End of the Search.