Homo erectus appeared as early as 750,000-500,000 years ago. They stood upright and learned simple tool use, mainly through employing suitably shaped rocks and sticks for hunting and gathering. Several species of Homo erectus developed and spread in Africa and to Asia and Europe, reaching a population size of perhaps 1.5 million 100,000 years ago. Homo erectus disappeared about 40,000 years ago. Our immediate ancestors were Homo sapiens sapiens. All current races are descended from this subspecies.…
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