How Egyptians knew Earth is not flat

Here is an Aha! moment in the history of science when Eratosthenes proved Earth is not flat. These clips are from the astronomer & master science communicator Carl Sagan's Cosmos.

Wish to watch the video clip? Here it is.

The thumbnail image is taken from Cristian Violatti's article in the Ancient History Encyclopedia

17383 registered users
6658 resources