It seems the researchers have not uncovered the fact that in Australian Aboriginal tribe (which I shall not name) trepanning is part of a warrior's initiation.

It seems the researchers have not uncovered the fact that in Australian Aboriginal tribe (which I shall not name) trepanning is part of a warrior's initiation. Initiated warriors have a large section of skull removed which understandably makes them very much aware of those about them who might attack them. Any researchers might easily lose their lives inquiring further into this matter. :)