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century of human bones have been dredged from the bottom of England ’s River Thames over the retiring two 100 , and a new bailiwick of these skeletons suggests that most of them date back to the Bronze and Iron ages . But why people deposited corpses into the Thames remains an open question .

In a study published Jan. 28 in the journalAntiquity , researcher detailed their analysis ofradiocarbon datesfrom 30 skeletons discovered in the Thames , with a end of inquire when and why army corps ended up in the river .

Four backlit people bend over and pick up items from the beach of the Thames at low tide, with buildings in the background

Volunteers cleaning the banks of the River Thames of rubbish and debris.

" Most people — let in Londoners ! — are quite get aback to hear that hundreds of human bones have do from the River Thames , " sketch lead authorNichola Arthur , a curator at the Natural History Museum in London , told Live Science in an electronic mail . Human skeletons " have been encountered fairly on a regular basis in the water places of northwest Europe , " Arthur said , but " the Thames human bones represent a unambiguously big assemblage . "

Researchers have analyse skeleton from the Thames since the 19th one C . One early theory about these discoveries was that the corpses came from a battle betweenCeltsandRomans , while in the late twentieth 100 , experts suggested most of the bodies came from corroding of riverbank burials and drowning victims .

" The bighearted question for these human bone is how they came to be in the river , " Arthur said . Her first step was to produce dozens of carbon 14 go steady to better realise when the bodies ended up there .

Eight human sacrifices were found at the entrance to this tomb, which held the remains of two 12-year-olds from ancient Mesopotamia.

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When the researcher merged their 30 new radiocarbon dates with 31 late dates , they key that the Thames soundbox come from 4000 B.C. to A.D. 1800 — a straddle of nearly 6,000 old age . But most came from the Bronze Age ( 2300 to 800 B.C. ) and the Iron Age ( 800 B.C. to A.D. 43 ) and were find in upstream zone of the river .

" We can now say with authority that these do n’t appear to just be bones that have steadily accumulated in the river through clock time , " Arthur say . " There really was something meaning going on in the Bronze and Iron Ages . "

A white woman with blonde hair in a ponytail looks at a human skull on a table

The precise reason for the physical structure ' placement in the Thames is unclear , but Arthur suspects that it was part of a wider pattern in northwestern United States Europe in which prehistorical people intentionally deposited ritually important remains in watery stead .

" This research has moved the argument along , but the funerary origin of these remains is yet to be completely study and demonstrated,“Chris Knüsel , a bioarchaeologist at the University of Bordeaux in France , differentiate Live Science in an electronic mail .

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Knüsel , who has also analyse the Thames remains but was not demand in Arthur ’s work , said the evidence may point to a different intellect the human corpse ended up in the Thames : violent face-off resulting from fights over this crucial river .

A selection of metal objects

" vehemence is a particularly mutual theme for later prehistorical human remains from watery places , " Arthur say , includingbog bodieswith evidence of violent deaths , and " we have found patterns of skeletal trauma on the bones of the Thames human remains . "

psychoanalysis of the injuries on the bones is the focus of a forthcoming study . " Exploring on the dot how the Thames human remain might gibe into these practice is one of the next exciting steps of the project , " Arthur tell .

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