History and Development
The Tibetan sky-burials appear to have evolved from ancient practices of defleshing corpses as discovered in archeological finds in the region. These practices most likely came out of practical considerations, but they could also be related to more ceremonial practices similar to the suspected sky burial evidence found at Göbekli Tepe (11,500 years before present) and Stonehenge (4,500 years bp). Most of Tibet is above the tree line, and the scarcity of timber makes cremation economically unfeasible. Additionally, subsurface interment is difficult since the active layer is not more than a few centimeters deep, with solid rock or permafrost beneath the surface.
The customs are first recorded in an indigenous 12th century Buddhist treatise, which is colloquially known as the Book of the Dead (Bardo Thodol). Tibetan tantricism appears to have influenced the procedure. Dissection occurs according to instructions given by a lama or tantric adept.
Read more about this topic: Sky Burial
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