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Stone Age

Stone Age Period of human evolution defined by the use of stone tools. The Stone Age dates from the earliest identifiable broken-pebble tools made by human ancestors c.2.5 million years ago. The period is generally considered to have ended when metal tools first became widespread during the Bronze Age. The Stone Age usually subdivides into the Palaeolithic, Mesolithic, and Neolithic.

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"Stone Age." World Encyclopedia. . Encyclopedia.com. 19 Aug. 2017 <http://www.encyclopedia.com>.

"Stone Age." World Encyclopedia. . Encyclopedia.com. (August 19, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/stone-age

"Stone Age." World Encyclopedia. . Retrieved August 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/stone-age

Stone Age

Stone Age a prehistoric period when weapons and tools were made of stone or of organic materials such as bone, wood, or horn.

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"Stone Age." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 19 Aug. 2017 <http://www.encyclopedia.com>.

"Stone Age." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (August 19, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/stone-age

"Stone Age." The Oxford Pocket Dictionary of Current English. . Retrieved August 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/stone-age

Stone Age

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"Stone Age." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 19 Aug. 2017 <http://www.encyclopedia.com>.

"Stone Age." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (August 19, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/stone-age

"Stone Age." The Columbia Encyclopedia, 6th ed.. . Retrieved August 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/stone-age