factrepublic.com, Tiny Fox Lab
Ancients measured long distances by hiring “bematists.” They were trained to count steps while walking between locations and could measure hundreds of miles with 95%+ accuracy. Eratosthenes used one to calculate the circumference of the Earth within 15% in 240 B.C.E. – Tiny Fox Lab Facts
Preview photo credit: factrepublic.com, tinyfoxlab.com
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