In 1969, Richard Leakey was surveying the harsh, wind-shaped landscape of Koobi Fora in northern Kenya when an ordinary day of fieldwork turned into a major paleoanthropological discovery. Walking through an eroded gully where ancient sediments had been exposed by natural weathering, Leakey and his colleague H. Mutua recovered fossil skull fragments that would later be cataloged as KNM-ER 406. Although the specimen was eventually classified as Paranthropus boisei rather than an early member of the genus Homo , the discovery played an important role in establishing Koobi Fora as one of the richest fossil regions ever studied. More importantly, it helped demonstrate how East Africa preserved a remarkable record of ancient hominin diversity.
