Carl Sagan talks about Eratosthenes. A man who estimated the circumference of the earth using just a stick, eyes, feet and brains. Debunking flat earthers 2200 years ago.

https://www.youtube.com/watch?v=G8cbIWMv0rI

Submitted March 03, 2019 at 12:39PM by TragicDonut https://ift.tt/2Uofxed