Jul 14, 2023
Really, that Roman Concrete was not progress. Stones weren't replaced with bronze to be replaced with iron? They did not progress from hunter gatherers to farmers and herdsmen?
TEK
Really, that Roman Concrete was not progress. Stones weren't replaced with bronze to be replaced with iron? They did not progress from hunter gatherers to farmers and herdsmen?
TEK
Worked in our nations space programs for more than 40 years