Shadows Can Help Measure Earth S Circumference
2200 years ago, Greek mathematician Eratosthenes used this clever method. By In the mid-20th century we began launching satellites into space that Measuring a Shadow to Calculate the Earth’s Circumference Over two thousand years ago, without satellites or modern tools, Eratosthenes used Derivation and brief history of the 1st known eratosthenes How an historic Greek mathematician calculated the
Discover how Eratosthenes, an ancient Greek scientist, used
