In 1994, scientists discovered the skeleton classified as Ardipithecus ramidus—nicknamed "Ardi"—which was more than a million years older than the world-famous "Lucy." But as Kermit Pattison reveals here, this breakthrough in our understanding of evolution triggered a feud throughout the scientific community 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, for decades the most famous family in paleoanthropology.