The Gombore humerus was, however, more recent than the Kanapoi humerus. Noting that stone tools were found near the Gombore humerus, Brigitte Senut (1979, pp. 112 –113) stated: “The stone industry of Gombore IB is like that of the upper part of Bed I and the base of Bed II at Olduvai (Tanzania), which have been dated at 1.7 million years by the potassium-argon method. The same radiometric method applied to basalt at the Ethiopian site gives the layers in which the Oldowan tools were found a date older than 1.5 million years.” The first excavators (Chavaillon
Senut (1979, p. 111) said, in an English summary of one of her French papers, that the Gombore humerus could, along with the Kanapoi humerus, “be attributed to the genus
Like Senut (1979), the original discoverers of the Gombore humerus hesitated to designate it as anything more than
which was primitively [first] attributed to the genus
So now we seem to have two very ancient and humanlike humeri to add to our list of evidence challenging the currently accepted scenario of human evolution. These are the Kanapoi humerus at 4.0–4.5 million years in Kenya and the Gombore humerus at more than 1.5 million years in Ethiopia. At the very least, the Early Pliocene Kanapoi humerus “could challenge the new phylogenies tending to show that only one genus and one species (
11.6 Richard, Son of Leakey
Louis Leakey’s son Richard at first avoided fossil hunting, working instead as a safari organizer for clients including the National Geographic Society. Eventually, however, Richard took up the family profession. Although he had no university training, he began to develop his own reputation as a competent paleoanthropologist.
In 1967, Richard Leakey, then just 23 years old, led the Kenya section of an international paleoanthropological expedition to the Omo region of southern Ethiopia. Unhappy at having to turn over fossils he discovered to professional scientists, Leakey suddenly left the Omo site. He flew by helicopter to Koobi Fora, on the crocodile-infested eastern shores of Kenya’s Lake Rudolf, now called Lake Turkana. On his very first walk around Koobi Fora, Leakey found a stone tool and fossil pig jaw. The site was promising, but he needed funding in order to systematically develop it.
In January of 1968, Richard Leakey journeyed to Washington, D.C., where he got a grant of 25,000 dollars from the National Geographic Society’s Committee for Research and Exploration. Returning to Kenya, Leakey set up a permanent camp at Koobi Fora.
That first year saw no major discoveries, but in 1969 Richard and his wife Meave found an australopithecine skull. Over the next few years, fossils of three more
11.6.1 Skull Er 1470