Tag Archives: Geometric Measurements

A 1635 painting by artist Bernardo Strozzi depicting Eratosthenes (left) instructing a student on how to calculate the Earth's size based on shadow lengths cast at different locations simultaneously.
c. 250 BCE: Eratosthenes’ Measurement of the Earth’s Circumference

Eratosthenes, known as the father of geography, accurately calculated the Earth's circumference over 2,200 years ago using simple observations of shadows and distances, a testament to the power of early scientific inquiry