Copper Arrowheads
Primitive copper arrowheads are regularly found perfectly preserved, almost as if they weren’t frozen in ice for thousands of years. These discovered arrowheads have helped historians approximate the intelligence levels of humans over the years, and they have made some shocking conclusions. These arrowheads were dated back over 1,000 years before historians presumed human beings were making these kinds of tools, this has given scientists a new perspective of the progression of intelligence in humans in history.