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Estimated age: 100,000 to 90,000 years. Location: Qafzeh Cave, Israel. This specimen is one of about 21 individuals found in Qafzeh Cave. The skull and nearly complete skeleton that accompanied it belonged to a male Homo sapiens who was about 20 years old when he died. It was found buried next to the remains of a small child.
Hominids walked the Earth as early as several million years ago. According to the United Nations Determinants and Consequences of Population Trends, modern Homo sapiens may have appeared about 50,000 B.C. This long period of 50,000 years holds the key to the question of how many people have ever been born. At the dawn of agriculture, about 8000 B.C., the population of the world was somewhere on the order of 5 million.