Are humans a product of ''incest'', if not then why do we all look similar?

yes. according professor robin fox of rutgers university, 80% of marriages in history have been between second cousins or closer. accepted founding population of homo sapiens (modern humans) small, anywhere 700 10,000 individuals, , combined population dispersal caused hunter-gatherer existence, amount of inbreeding have been inevitable.

if go enough in time, have come same man , woman, don't u think?

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