What are our human roots? What is the history of Man? The first homonids –¬†creatures who stood upright and used their hands – appeared on Earth¬† 20 million years ago. The first humans – homo sapiens – walked on Earth only 150,000 years ago. Is there a missing link? Isaac Asimov, storyteller extraordinaire, traces the discovery of our human roots step by step. Illustrated with black and white sketches. Contents: The Stone Age; Neanderthal Man; Java Man and Peking Man; The Little Ape-Men; How It Began.