The date predates the genus Homo by 500,000 years, suggesting this tool making was undertaken by Australopithecus or Kenyanthropus (which was found near Lomekwi 3).[1] Previously, evidence of stone tool use by Australopithecus has been suggested on the basis of marks on animal bones, but those findings have been hotly debated, with no scientific consensus forming on either side of the debate.[2]