
The mystery of ‘high-tech’ tool marks in China’s ancient Longyou Caves
How did people in remote history manage to carve out these caverns leaving tool marks that only find their likeness in modern mining operations?
Researcher Jared Diamond in his book Collapse (2005), assumed that the removal of vegetation and overcrowding rats resulted in tremendous erosion, a great scarcity of resources and food, and, ultimately,…