Mask of Vaikuntha Vishnu, late 5th century. Learn more about 5th century masks
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Also called the Old Stone Age, this is the period of human history marked by the development and use of stone tools. The period ranges from the first use of stone tools around 3.3 million years ago to the end of the Pleistocene Epoch around 11,650 years ago. Tools made from obsidian and chert, as well as bone tools, are associated with this period. The earliest examples of cave art are also dated to this era.