Uppsala [Sweden], March 7 (ANI): Mummification is the process of preserving the body after death by deliberately drying or embalming flesh. A recent discovery made at the hunter-gatherer burial sites in the Sado Valley in Portugal, dating to 8,000 years ago found that mummification of the dead probably seemed to be more common in prehistory than previously known. A recent study presented new evidence for pre-burial treatments such as desiccation through mummification, which had not been suggested for the European Mesolithic before.