During excavations at Lake Turkana in 1984, paleoanthropologist Richard Leakey, assisted by Kamoya Kimeu, discovered the Turkana Boy, a 1.6-million-year-old ''Homo erectus'' fossil. Previous research on early hominids is particularly identified with Mary Leakey and Louis Leakey, who were responsible for the preliminary archaeological research at Olorgesailie and Hyrax Hill. Later work at the former site was undertaken by Glynn Isaac.