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.
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
Source: en.wikipedia.org/wiki/B…