Excarnation may be precipitated through natural means, involving leaving a body exposed for animals to scavenge, or it may be purposefully undertaken by butchering the corpse by hand.
Archaeologists believe that in this practice, people typically left the body exposed on a woven litter or altar. Following excarnation, the litter with its remains would be removed from the site. Since metatarsals, finger bones and toe bones are very small, they would easily fall through gaps in a woven structure or roll off the side during this removal. Thus a site where only small bones are found is suggestive of ritual excarnation.
There have been numerous solar concentrators installed in Mumbai in India to incinerate bodies as an alternative way to naturally break them down to bare bones in just 3 days. These practices are changing due to a shortage of vultures in India, which has caused the practice to evolve in order to still serve the same purpose.
Neolithic farmers living in Tavoliere, Italy, over 7000 years ago practiced ritual defleshing of the dead. Light cut marks suggest that the bones were defleshed up to a year after death. The bones were deposited in Scaloria Cave and, when excavated, were mixed with animal bones, broken pottery and stone tools.
In the Middle Ages, excarnation was practised by European cultures as a way to preserve the bones when the deceased was of high status or had died some distance from home. One notable example of a person who underwent excarnation following death was Christopher Columbus. The American Revolutionary War general, Anthony Wayne, also underwent a form of excarnation. A practice known as mos teutonicus, or active excarnation, was a German custom. The bodies were broken down differently than solely defleshing, they were cut up and subsequently boiled in either wine, water, or vinegar.
In modern Japan, where cremation is predominant, it is common for close relatives of the deceased to transfer, using special chopsticks, the remaining bones from the ashes to a special jar in which they will be interred. However, in ancient Japanese society, prior to the introduction of Buddhism and the funerary practice of cremation, the corpse was exposed in a manner very similar to the Tibetan sky burial.The Kalash people of Pakistan until recently ( mid 1980s ) practiced above ground burial in large wood coffins were the dead were lied with all their best belongings in cemeteries called Madokjal or place of many coffins . This tradition had been dieing off with the last being the burial of a shaman in 1985 , until the burial in 2016 of Batakeen of Anish village Bumburet .
Pre-contact Hawaiians ritually defleshed the bones of high-ranking nobles (ali'i) so that they could be interred in reliquaries for later veneration. The remains of Captain Cook, who the Hawaiians had believed to be the god Lono, were treated this way after his death. The Moriori people of the Chatham Islands (now part of New Zealand) placed their dead in a sitting position in the sand dunes looking out to sea; others were strapped to young trees in the forest. In time, the tree grew into and through the bones, making them one.
Following the excarnation process, many societies retrieved the bones for burial.
Defleshing during the Middle Ages
During the Middle Ages in Europe, defleshing was a mortuary procedure used mainly to prepare human remains for transport over long distances. The practice was used only for nobility. It involved removing skin, muscles, and organs from a body, leaving only the bones. In this procedure, the head, arms, and legs were detached from the body. The process left telltale cuts on the bones.
King Saint Louis IX of France is said to have been defleshed by boiling his corpse until the flesh separated from the bones. This was intended to preserve his bones, to avoid decaying of the remains during their return to France from the Eighth Crusade, and to provide relics. The process is known as mos Teutonicus.
Distinguishing excarnation from cannibalism
Archaeologists seeking to study the practice of ritual excarnation in the archeological record must differentiate between the removal of flesh as a burial practice, and as a precursor to cannibalism. When human bones exhibiting signs of flesh removal are discovered in the fossil record, a variety of criteria can be used to distinguish between the two. One common approach is to compare the tool marks and other cuts on the bones with butchered animal bones from the same site, with the assumption that cannibalized humans would have been prepared like any other meat, whereas excarnated bodies would be prepared differently. Cannibalized bones, in contrast to excarnated bones, may also exhibit telltale signs such as human tooth marks, broken long bones (to facilitate marrow extraction), and signs of cooking, such as "pot polishing".
Markandya, Anil; Taylor, Tim; Longo, Alberto; Murty, M.N.; Murty, S.; Dhavala, K. (2008). "Counting the cost of vulture decline—An appraisal of the human health and other benefits of vultures in India" (PDF). Ecological Economics. 67 (2): 194–204. doi:10.1016/j.ecolecon.2008.04.020. hdl:10036/4350.
In Mumbai, the Towers of Silence are located in a plot of 53 acres of land in Doongerwadi on a hilltop far from the city. At this site there are 8 solar concentrations installed at a cost of Rs. 200,000 each. In these towers the solar concentrations will produce heat of 120 degrees Celsius, which is sufficient to turn a body into a skeleton in 3 days.
- Markandya, Anil; Taylor, Tim; Longo, Alberto; Murty, M.N.; Murty, S.; Dhavala, K. (2008). "Counting the cost of vulture decline—An appraisal of the human health and other benefits of vultures in India" (PDF). Ecological Economics. 67 (2): 194–204. doi:10.1016/j.ecolecon.2008.04.020. hdl:10036/4350.
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- Hugh T. Harrington and Lisa A. Ennis. "Mad" Anthony Wayne: His Body Did Not Rest in Peace. http://www.americanrevolution.org/wayne.html, citing History of Erie County, Pennsylvania, vol. 1. pp. 211–2. Warner, Beers & Co., Chicago. 1884.
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- Scott, G. Richard; McMurry, Sean (2014-10-20). "The Delicate Question: Cannibalism in Prehistoric and Historic Times". An Archaeology of Desperation: Exploring the Donner Party's Alder Creek Camp. University of Oklahoma Press. ISBN 9780806185521.
- "Beyond Stone and Bone » Criteria for Cannibalism - Archaeology Magazine Archive". archive.archaeology.org. Retrieved 2018-06-06.