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.