Trepanning is a process whereby a hole is drilled in the skull, and, with evidence going back to prehistoric times, it is one of the oldest surgical practices in history. The earliest trepanned skull was discovered at a Neolithic burial site in France, and is more than 7,000 years old. It may have had a practical effect – to relieve pressure on the skull after an injury – but it could have also been used to give a trapped demon a hole to escape, or so it was believed. Many different civilisation

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Landmine Spring - Trepanning

Amanda Feilding performed self-trepanation (drilled a hole in her own skull) to feel permanently high and experience a higher level of consciousness. She filmed the whole procedure and produced a documentary "Heartbeat in the Brain". Thought to be lost media for years but some clips are now public

8 Surprising Celery Juice Benefits - Clean Juice