Human Evolution: Trails from the Past. By Camilo J. Cela‐Conde and, Francisco J. Ayala. Oxford and New York: Oxford University Press. $150.00 (hardcover); $69.50 (paper). vii + 437 p.; ill.; index. 978‐0‐19‐856779‐0 (hc); 978‐0‐19‐856780‐6 (pb). 2007.