To be pedantic right back, you dropped an 'n' in the word and a 'millennia' is 1000 years. Yes, humans have existed on earth for dozens of millennia and in fac

To be pedantic right back, you dropped an 'n' in the word and a 'millennia' is 1000 years. Yes, humans have existed on earth for dozens of millennia and in fact we have evidence of early civilizations from around a dozen millennia ago.