Sometime around 1800 B.C., a Sumerian scholar inscribed a hand-sized clay tablet with a series of cryptic numbers. The unusual tablet, known as Plimpton 322 (below), has provoked years of fevered ...
Around 1900 B.C., a student in the Sumerian city of Nippur, in what’s now Iraq, copied a multiplication table onto a clay tablet. Some 4,000 years later, that schoolwork survives, as do the student’s ...
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