A cave on Borneo has been used for 20,000 years: 400-year-old rock art depicts colonial resistance phys.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from phys.org Daily Mail and Mail on Sunday newspapers.
In ancient or indigenous cultures, the creator god inserts a crystal into the forehead of a student-shaman, granting 'second sight' into the spirit world.