The Wayback Machine - https://web.archive.org/web/20160304051733/https://www.naturalsciences.be/expo/old_ishango/en/ishango/introduction.html
the Ishango bone the exhibition
introduction deciphering the bone Ishango map the discoverer




the ISHANGO bone



...20.000 years old ...



... 60 - 48 - 60 ...



... Jean de Heinzelin de Braucourt ...



    ... oldest mathematical object ...