The human race, originating almost one million years ago, saw the appearance of the six colored races in the Stone Age 500,000 years ago. [1]
Metals were widely used in the early industrial and trading cities, with no distinct periods like the Stone, Bronze, and Iron Ages coexisting in different localities. [2]
European research on the Old Stone Age focuses on uncovering tools, bones, and artcraft of the ancient blue men, ancestors of the white races who intermixed with yellow, red, and violet races. [3]