Piltdown Man

Summary

Piltdown Man was presented in London in 1912 as an early human from the Sussex gravels, with a human braincase and an ape's jaw. In 1953 it was shown to be a forgery, and a 2016 study found the same forger's methods at both of its sites, pointing to its finder, Charles Dawson.

Its scientific name was Eoanthropus dawsoni, "Dawson's dawn man". It was doubted within a year, by anatomists who said the jaw belonged to an ape. What took forty years was a test: fluorine measurements in 1949, then a re-examination in 1953 that found the teeth filed and the bones stained.

The forgery is settled. The open question is whether Dawson worked alone.

What is documented

The finder. Charles Dawson was a solicitor practising at Uckfield, in Sussex, and an amateur antiquarian and fossil collector. In February 1912 he wrote to Arthur Smith Woodward, Keeper of Geology at the British Museum (Natural History), about a thick piece of skull from a gravel pit on the Barkham Manor estate at Piltdown. Dawson's account was that a workman at the pit had handed him the first fragment some years earlier, and that he had since found more. Over the following months Dawson and Woodward dug the pit together. Pierre Teilhard de Chardin, a young French Jesuit then studying in England, took part in some of the excavations.

The announcement. On 18 December 1912, at a meeting of the Geological Society of London at Burlington House, Dawson and Woodward presented pieces of a braincase, human in form, and part of an ape-like lower jaw holding two worn molars. Woodward named the creature Eoanthropus dawsoni. Dawson's obituary in the Geological Magazine recorded that the description drew "the largest meeting of the Geological Society ever assembled".

The additions. In August 1913 Teilhard found a canine tooth, intermediate in size between an ape's and a human's. In 1914 the pit produced a carved slab of bone, soon nicknamed the "cricket bat". In 1915 Dawson sent Woodward two postcards reporting skull fragments and a molar from a second site, about 3 kilometres away, now called Piltdown II. He never disclosed exactly where it was. Dawson died on 10 August 1916, aged 52. Woodward presented the Piltdown II finds to the Geological Society in 1917.

The early critics. On 13 November 1913 David Waterston, an anatomist at King's College London, argued in Nature that the jaw was an ape's and did not belong with the human braincase. In 1915 Gerrit Smith Miller of the United States National Museum published a 31-page study concluding that the jaw was a chimpanzee's. Martin Ramström at Uppsala in 1916, Marcellin Boule in France, and later Franz Weidenreich and Aleš Hrdlička took the same view: two animals, found together. The position became known as the "dualist" one.

The memorial and the reserve. On 23 July 1938 Sir Arthur Keith unveiled a stone monolith in the grounds of Barkham Manor marking the site. In 1952 the Nature Conservancy made the Piltdown pit Britain's first geological National Nature Reserve. The following year, the specimens it commemorated were shown to be fakes.

The fluorine test. Buried bone takes up fluorine from groundwater over time, so bones that lay in the same gravel for the same period should carry similar amounts. In 1949 Kenneth Oakley of the museum measured the fluorine in the Piltdown bones, publishing the results with C. R. Hoskins in Nature in March 1950. The levels were low. In the museum's own summary, the remains were only about 50,000 years old, against the 500,000 years once proposed for them.

The exposure. In 1953 Joseph Weiner, a biological anthropologist at Oxford, re-examined the originals with Oakley and the Oxford anatomist Wilfrid Le Gros Clark. They found that the molars had been filed down to imitate human wear, that the bones had been stained with iron and chromium compounds, and that the canine had been filed and coloured with paint. Refined fluorine and nitrogen analyses showed the jaw was essentially modern. Their paper, "The solution of the Piltdown problem", appeared in the museum's Bulletin in November 1953, and newspapers reported it on 21 November.

The rest of the assemblage. A second, longer paper in 1955 extended the examination to everything else from the pit. Together the two papers showed that the animal fossils were genuine but had been gathered from other places and planted, that the flint tools had been stained to match the gravel, and that the "cricket bat" had been carved with a steel knife.

The radiocarbon dates. In 1959 Hessel de Vries and Oakley dated the cranium to about 620 years old and the jaw to about 500 years, each plus or minus 100 years. A later accelerator measurement at Oxford gave the jaw only 90 years, plus or minus 120, a result consistent with a specimen from a Victorian or Edwardian collection. A frontal bone from Piltdown II came out at about 970 years, plus or minus 140. These figures are as summarised in the 2016 study, whose own dating attempts largely failed because of contamination.

The 2016 study. A team of sixteen led by Isabelle De Groote of Liverpool John Moores University, including Chris Stringer of the Natural History Museum, re-examined the Piltdown I and Piltdown II specimens using DNA analysis, CT scanning and spectroscopy. The Piltdown I canine and the Piltdown II molar carried the same mitochondrial haplotype, consistent with a single individual: a Bornean orangutan, most likely from south-west Sarawak. The authors judged it highly likely that one orangutan specimen and at least two human specimens, possibly medieval, had been used. The same method appeared at both sites: bones stained brown, cavities packed with gravel and plugged with small pebbles, and repairs made with a putty resembling a white silicate dental filling, rich in zinc and zirconium. The authors concluded that this pointed to a single forger, "most likely Charles Dawson", and added that whether he acted alone is uncertain.

Dawson's other discoveries. The archaeologist Miles Russell of Bournemouth University has reviewed Dawson's wider record and concluded that at least 38 of his discoveries are obvious fakes, among them the teeth of Plagiaulax dawsoni, offered as a link between reptiles and mammals, the "Pevensey brick" and the "Bexhill boat". Russell's summary is that Piltdown was "not a 'one-off' hoax, more the culmination of a life's work".

Leading explanations

Charles Dawson, forger. The leading explanation; strongly supported, not proven by confession. Dawson produced or reported every major find. He was the only person connected with the Piltdown II site and never said where it was. The 2016 study showed that one orangutan supplied teeth to both sites and that one method was used throughout. His wider collection contains many fakes. Against that, the case is physical and circumstantial: Dawson died 37 years before the exposure and left no confession, and his motive is inferred, not recorded.

An accomplice. Possible; unproven. The 2016 authors leave the question open. Stephen Jay Gould argued in 1980 that Teilhard de Chardin was involved; others have defended him, and J. Francis Thackeray revisited the question in Antiquity in 2012. A trunk belonging to Martin Hinton, a museum zoologist, found at the museum in the 1970s, held bones and teeth carved and stained in ways resembling the Piltdown material. It was reported in Nature in 1996 as evidence against him, and Brian Gardiner restated the case in 2003. In 2025 Christopher Dean, a co-author of the 2016 study, asked why the London dental surgeon Arthur Swayne Underwood, who studied the Piltdown teeth and had written about silicate dental cements in 1911, did not see the filing. Dean presents this as an open puzzle and notes there is no evidence that Underwood and Dawson had met before the jaw was found.

Arthur Conan Doyle. Proposed in 1983; circumstantial and widely rejected. John Winslow and Alfred Meyer argued in the magazine Science 83 that Doyle, who lived nearby at Crowborough, planted the finds. The case rests on coincidence and supposition. The palaeontologist Darren Naish has called it "wholly circumstantial", and no physical evidence connects Doyle to the forgery.

Current status

Debunked. Every component of Piltdown Man has been identified: a recent orangutan jaw and teeth, fragments of at least two human skulls centuries old at most, genuine fossils imported from elsewhere, stained flints and a carved bone. The forgery has been beyond dispute since 1953.

What remains open is authorship in the narrow sense. The evidence points to Charles Dawson, and the 2016 study found a single method at work. Whether anyone helped him is unknown. Documentary evidence, such as correspondence showing a second person preparing the specimens, is the kind of finding that could change that part of the record.

Last reviewed: September 2026. Records are provisional. Where the evidence changes, the entry changes. Found an error? Tell us.