Apr 25, 2018
Basic arithmetic Arithmetic started 25,000 years ago in Africa. The Ishango bone is a tool handle with notches carved into it found in the Ishango region of Zaïre (now called Congo) near Lake Edward.
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Basic arithmetic Arithmetic started 25,000 years ago in Africa. The Ishango bone is a tool handle with notches carved into it found in the Ishango region of Zaïre (now called Congo) near Lake Edward.