Carl Sagan explains how the ancient Greeks knew the Earth was round and calculated it's circumference over 2,000 years ago! https://t.co/7kGFLw5n7y— Tech Burrito (@TechBurritoUno) February 28, 2021
Carl Sagan explains how the ancient Greeks knew the Earth was round and calculated it's circumference over 2,000 years ago! https://t.co/7kGFLw5n7y