Science: Ptolemy's 'Geography, ' c. AD 150 -- Exchange: Al-Idrīsī, AD 1154 -- Faith: Hereford 'Mappamundi, ' c. 1300 -- Empire: Kangnido World Map, 1402 ...
When Christopher Columbus first set foot in what's now the Bahamas, it was the lucky sum of a 1,400-year-old cartographical error and Columbus's own miscalculations ...
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