I still state that our ancestors were more advanced then we thought. It's so easy for us today to mock the past be denying evidence...because it's "impossible" for today's technology to have been used in the past.
Batteries in Eqypt
Mechanical clock in Greece
Norsemen in the Midwest
You name it...
Along with Celts, Phoenicians, Egyptians, Jews, Chinese...in various other parts of the US.