In 1994, scientists discovered the skeleton classified as Ardipithecus ramidus—nicknamed "Ardi"—which was a million years older than the world-famous "Lucy." But as Kermit Pattison reveals, this breakthrough triggered a feud about the oldest skeleton. Telling the story of the discovery and its fallout, Pattison introduces expedition leader Tim White, a contentious but brilliant scientist; Gen Suwa, the world's foremost expert on teeth; Don Johanson, the discoverer of Lucy, who had a rancorous falling out with the Ardi team; and the Leakeys, the foremost family in paleoanthropology.