By the close of the Pleistocene, the human population numbered had been several million.
The Pleistocene geological epoch, which covered the most recent period of repeated glaciations on Earth, lasted from about 2,580,000 to 11,700 years ago. Our own species, Homo sapiens, evolved and spread throughout the Pleistocene, and by the end of the epoch, humans had colonized most of the globe. The Pleistocene Epoch, also known as the "Great Ice Age," is best known for being a period when massive ice sheets and other glaciers repeatedly formed on landmasses. The first means of human survival during the Ice Age was foraging and gathering food from various plants, including nuts and berries. Because herds of animals offered a consistent source of food, humans started hunting them.
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