A bog body is a human cadaver that has been Natural mummy in a Bog. Such bodies, sometimes known as bog people, are both geographically and chronologically widespread, having been dated between 8000 BC and the Second World War.Fischer 1998. p. 237. The common factors of bog bodies are that they have been found in peat and are at least partially preserved. However, the actual levels of preservation vary widely, from immaculately preserved to mere skeletons.Van der Sanden 1996. p. 7.
Due to the unusual conditions of peat bogs – highly acidic water, low temperature, and a lack of oxygen – the soft tissue of bog bodies can be remarkably well-preserved in comparison to typical ancient human remains. The high levels of acidity can tan their skin and preserve internal organs, but inversely dissolve the calcium phosphate of bone. The natural protein keratin, present in skin, hair, nails, wool and leather, is resistant to the acidic conditions of peat bogs.
The oldest known bog body is the skeleton of Koelbjerg Man from Denmark, which has been dated to 8000 BC, during the Mesolithic period. The oldest fleshed bog body is that of Cashel Man from Ireland, which dates to 2000 BC during the Bronze Age. The overwhelming majority of bog bodies – including examples such as Tollund Man, Grauballe Man and Lindow Man – date to the Iron Age and have been found in northwest Europe, particularly Denmark, Germany, the Netherlands, United Kingdom, Sweden, Poland, and Ireland. Such Iron Age bog bodies show a number of similarities, such as violent deaths and a lack of clothing, leading many archaeologists to believe that they were killed and deposited in bogs as a part of a widespread cultural tradition of human sacrifice, or executed as criminals. Bogs may have historically been seen as liminal places positively connected to another world, which might welcome contaminating items otherwise dangerous to the living. More recent theories postulate that bog people were perceived as social outcasts or "witches", as legal hostages killed in anger over broken treaty arrangements, or as victims of unusual deaths, eventually buried in bogs according to traditional customs.
The German scientist Alfred Dieck published a catalogue of more than 1,850 bog bodies that he had counted between 1939 and 1986, but most were unverified by documents or archaeological finds; a 2002 analysis of Dieck's work by German archaeologists concluded that much of his work was unreliable. Countering Dieck's supposed findings of more than 1,400 bog bodies, a more recent study finds the number of documented bog bodies to be closer to 122. The most recent bog bodies are those of soldiers killed in the wetlands of the Soviet Union during the Second World War.
A limited number of bogs have the correct conditions for preservation of mammalian tissue. Most of these are located in colder climates near bodies of salt water. For example, in the area of Denmark where the Haraldskær Woman was recovered, salty air from the North Sea blows across the Jutland wetlands and provides an ideal environment for the growth of peat.Silkeborg Museum As new peat replaces the old peat, the older material underneath rots and releases humic acid, also known as bog acid. The bog acids, with similar to vinegar, preserve human bodies in the same way as fruit is preserved by pickling. In addition, peat bogs form in areas lacking drainage and hence are characterized by almost completely anaerobic conditions. This environment, highly acidic and devoid of oxygen, denies the prevalent subsurface aerobic organisms any opportunity to initiate decomposition. Researchers discovered that preservation also requires that the body is placed in the bog during the winter or early spring when the water temperature is coldi.e., less than . This allows bog acids to saturate the tissues before decay can begin. Bacteria are unable to grow rapidly enough for decomposition at temperatures under 4 °C.
The bog chemical environment involves a completely saturated acidic environment, where considerable concentrations of organic acids, which contribute most to the low pH of bog waters, and aldehydes are present. Layers of sphagnum, which are compacted layers of irregular mosses and other peat debris, and peat assist in preserving the cadavers by enveloping the tissue in a cold immobilizing matrix, impeding water circulation and any oxygenation. An additional feature of anaerobic preservation by acidic bogs is the ability to conserve hair, clothing and leather items. Modern experimenters have been able to mimic bog conditions in the laboratory and successfully demonstrated the preservation process, albeit over shorter time frames than the 2,500 years that Haraldskær Woman's body has survived. Most of the bog bodies discovered showed some aspects of decay or else were not properly conserved. When such specimens are exposed to the normal atmosphere, they may begin to decompose rapidly. As a result, many specimens have been effectively destroyed. As of 1979, the number of specimens that have been preserved following discovery was 53.Gill-Frerking, Heather. "Bog Bodies-Preserved from Peat." Mummies of the World. Ed. Wilfried Rosendal and Alfried Wiczorec. 2009. 63. Print.Hajo Hayen: Die Moorleiche aus Husbäke 1931. In: Archäologische Mitteilungen aus Nordwestdeutschland. 2, 1979, , S. 48–55.
Around 3900 BC,Official Danish history @http://denmark.dk/en/society/history/ agriculture was introduced to Denmark, either through cultural exchange or by migrating farmers, marking the beginning of the Neolithic in the region.Bennike 1999. p. 27. It was during the early part of this Neolithic period that a number of human corpses that were interred in the area's peat bogs left evidence that there had been resistance to its introduction.Bennike 1999. p. 29. A disproportionate number of the Early Neolithic bodies found in Danish bogs were aged between 16 and 20 at the time of their death and deposition, and suggestions have been put forward that they were either human sacrifices or criminals executed for their socially deviant behaviour. An example of a Bronze Age bog body is Cashel Man, from 2000 BC.
For these people, the bogs held some sort of liminal significance, and indeed, they placed into them intended for the Otherworld, often of Torc, wristlets or ankle-rings made of bronze or more rarely gold. The archaeologist P. V. Glob believed that these were "offerings to the gods of fertility and good fortune." It is therefore widely speculated that the Iron Age bog bodies were thrown into the bog for similar reasons and that they were therefore examples of human sacrifice to the gods. Explicit reference to the practice of drowning slaves who had washed the cult image of Nerthus and were subsequently ritually drowned in Tacitus' Germania, suggesting that the bog bodies were sacrificial victims may be contrasted with a separate account ( Germania XII), in which victims of punitive execution were pinned in bogs using hurdles.
Many bog bodies show signs of being Stabbing, bludgeoned, hanged or , or a combination of these methods. In some cases, the individual had been beheaded. In the case of the Osterby Man found at Kohlmoor, near Osterby, Germany, in 1948, the head had been deposited in the bog without its body.
Usually, the corpses were naked, sometimes with some items of clothing with them, particularly headgear. The clothing is believed to have decomposed while in the bog for so long. In a number of cases, twigs, sticks or stones were placed on top of the body, sometimes in a cross formation, and at other times, forked sticks had been driven into the peat to hold the corpse down. According to the archaeologist P. V. Glob, "this probably indicates the wish to pin the dead man firmly into the bog". Some bodies show signs of torture, such as Old Croghan Man, who had deep cuts beneath his nipples.
Some bog bodies, such as Tollund Man from Denmark, have been found with the rope used to strangle them still around their necks. Similarly to Tollund Man, Yde Girl, who was found in the Netherlands and was approximately 16 years old at her time of death, has a woollen rope with a sliding knot still tied around her neck. Yde Girl's remains showed evidence indicating that she had sustained trauma prior to her death. Aside from the rope preserved around her neck indicating strangulation, near her left clavicle there are marks indicating that she was also subjected to sharp force trauma. Yde Girl, and other bog bodies in Ireland, had the hair on one side of their heads closely cropped, although this could be due to one side of their head being exposed to oxygen for a longer period of time than the other. Some of the bog bodies seem consistently to have been members of the upper class: their fingernails are manicured, and tests on hair protein routinely record good nutrition. Strabo records that the Celts practised auguries on the entrails of human victims: on some bog bodies, such as the Weerdinge Men found in the northern Netherlands, the entrails have been partly drawn out through incisions.
Modern techniques of forensic analysis now suggest that some injuries, such as broken bones and crushed skulls, were not the result of torture, but rather due to the weight of the bog. For example, the fractured skull of Grauballe Man was at one time thought to have been caused by a blow to the head. However, a CT scan of Grauballe Man by Danish scientists determined his skull was fractured due to pressure from the bog long after his death.
With the rise of antiquarianism in the 19th century, some people began to speculate that many of the bog bodies were not recent murder victims but were ancient in origin. In 1843, at Corselitze on Falster in Denmark, a bog body unusually buried with ornaments (seven glass beads and a bronze pin) was unearthed and subsequently given a Christian burial. By order of the Crown Prince Frederick, who was an antiquarian, the body was dug up again and sent to the National Museum of Denmark. According to the archaeologist P.V. Glob, it was "he, more than anyone else, who helped to arouse the wide interest in Danish antiquities" such as the bog bodies.
After the Haraldskær Woman was unearthed in Denmark, she was exhibited as having been the legendary Queen Gunhild of the Early Mediaeval period. This view was disputed by the archaeologist J. J. A. Worsaae, who argued that the body was Iron Age in origin, like most bog bodies, and predated any historical persons by at least 500 years. The first bog body that was photographed was the Iron Age Rendswühren Man, discovered in 1871, at the Heidmoor Fen, near Kiel in Germany. His body was subsequently smoked as an early attempt at conservation and put on display in a museum. With the rise of modern archaeology in the early 20th century, archaeologists began to excavate and investigate bog bodies more carefully and thoroughly.
More modern analyses using stable isotope measurements have allowed scientists to study bone collagen collected from Tollund Man to determine his diet as being terrestrial-based. Their teeth also indicate their age at death and what type of food they ate throughout their lifetime. Dental caries, which are cavities within teeth, can direct archaeologist toward a person's diet prior to their death. Unlike erosion that the teeth may undergo due to decay, dental caries are typically sharp and well-defined cavities that have a larger diameter than erosion that occurs after death. Significant rates of dental caries point to diets that are rich in carbohydrates and can lead archaeologists to differentiate between plant-based diets and protein-based diets (animal protein is non-cariogenic). Dental enamel defects known as hypoplasias can also be seen in the analysis of teeth and can point towards malnutrition as well as diseases. Ground-penetrating radar can be used in archaeological investigation to map features beneath the ground to reconstruct 3D visualizations. For bog bodies, ground-penetrating radar can be used to detect bodies and artefacts beneath the bog surface before cutting into the peat.
Forensic facial reconstruction is one technique used in studying the bog bodies. Originally designed for identifying modern faces in crime investigations, this technique is a way of working out the facial features of a person by the shape of their skull. The face of one bog body, Yde Girl, was reconstructed in 1992 by forensic pathologist Richard Neave of Manchester University using CT scans of her head. Yde Girl and her modern reconstruction are displayed at the Drents Museum in Assen. Such reconstructions have also been made of the heads of Lindow Man (British Museum, London, United Kingdom), Grauballe Man, Girl of the Uchter Moor, Clonycavan Man, Roter Franz and Windeby I.
The bodies have been most commonly found in the countries of Denmark, Germany, the Netherlands, Great Britain, and Ireland. In 1965, the German scientist Alfred Dieck catalogued more than 1,850 bog bodies, but later scholarship revealed that much of Dieck's work was erroneous, and the exact number of discovered bodies is unknown.
Several bog bodies are notable for the high quality of their preservation and the substantial research by archaeologists and forensic scientists.
Cashel Man | 2000 BC | 2011 |
Oldest fleshed bog body in the world. |
Cladh Hallan mummies | 1988 | ||
Uchter Moor Girl | 2000 | ||
Haraldskær Woman | 1835 | ||
Gallagh Man | 1821 | ||
Borremose Bodies | 1940s | ||
Tollund Man | 1950 | ||
Clonycavan Man | 2003 | ||
Old Croghan Man | 2003 |
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Grauballe Man | 1952 | ||
Weerdinge Men | 1904 | ||
Yde Girl | 1897 | ||
Windeby I | 1952 | ||
Lindow Man | 1984 | ||
Bocksten Man | 1936 |
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