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The first bipedal apes appeared in a time of climatic transition and variation, and Homo erectus, an extinct species possibly ancestral to modern humans, originated during the colder Pleistocene Epoch and survived both the transition period and multiple glacial-interglacial cycles.

#Earth thousands of years later full

Homo sapiens has experienced nearly two full glacial-interglacial cycles, but its global geographical expansion, massive population increase, cultural diversification, and worldwide ecological domination began only during the last glacial period and accelerated during the last glacial-interglacial transition. The history of humanity-from the initial appearance of genus Homo over 2,000,000 years ago to the advent and expansion of the modern human species ( Homo sapiens) beginning some 150,000 years ago-is integrally linked to climate variation and change.

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#Earth thousands of years later how to

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