The sexual dimorphism between males and females was slightly greater than modern man, with males being about 25% larger than females. The discovery of the skeleton KNM-WT 15000, "Turkana boy" ("Homo ergaster"), made near Lake Turkana, Kenya by Richard Leakey and Kamoya Kimeu in 1984, is one of the most complete hominid-skeletons discovered, and has contributed greatly to the interpretation of human physiological evolution.