Forward from: አዲስ ምልከታ🌍
Around 2200 years ago, Eratosthenes put two sticks in the cities of Alexandria and Syene, and measured their shadows to "measure earth's circumference".
Today we take that as a proof that earth is a globe. But is it? Does different shadow lengths necessarily mean globe shape?
Today we take that as a proof that earth is a globe. But is it? Does different shadow lengths necessarily mean globe shape?