The same fluorine test—which fortunately applies to such fossilated things as bone, antler, and ivory—exposed an even more notorious impostor, expelling him from the select corps of early men. This was Piltdown man, alias _Homo eoanthropus dawsoni_, alias _Eoanthropus_, alias Dawson’s Dawn Man. It was demonstrated to be a fake and a forgery that led its discoverer to try to match a reasonably human skull to the jaw of an ape. The jaw and its teeth had been modified by the faker—not Dawson—to make it appear less apelike. Both jaw and skull had been artfully treated with chemicals to appear as antiquated as the unusual assortment of fossils with which they were salted into early interglacial deposits. Many of the fossils, while authentic in their own right, also were chemically stained and planted. And tools were added to complete the assemblage. The latter included a bone pick thoughtfully carved from the femur of an elephant, but it was carved with a modern steel knife, as careful scrutiny under a powerful lens disclosed, and not with the stone flakes of prehistoric man. (See illustration, page 74.) The British scientists Kenneth Oakley, J. S. Wiener, and Sir Wilfrid Le Gros Clark exposed the forgery in a most conclusive manner.[9] In laying the ghost of Piltdown, these authorities resolved four decades of controversy as to his place in human evolution. Although Piltdown’s contribution to human evolution now is known to have been nil, his contribution to physical anthropology has been considerable. As the academic dust settled on this issue, the anthropologists returned to their laboratories with greater confidence in their science and with somewhat sharper tools in their research kits. It is unlikely that any new hoax will ever acquire the same importance as Piltdown. Ancestors from Heidelberg and Swanscombe? We still have at least four authentically early human fossils from which European men may have descended. Each has its own interesting story.[10] The fragment of jaw found under 80 feet of sand at Mauer, Germany, we call Heidelberg man, although he is the least human of the lot. He seems also to be the most ancient, perhaps belonging to the first interglacial period. At least the bones of horses, elephants, bears, and other animals found at the same level in the sand pit derive from the early stages of the Ice Age. Heidelberg man clearly lacks a chin, and his molar teeth are reminiscent in some ways of cattle rather than men or even monkeys, for that matter. This is an important clue, for the same thing, “taurodontism,” occurs much later among some of the Neanderthals.