Carl Sagan - How We Know The Earth Is Round

2020-05-31 02:46:36 -

A really excellent video from Carl Sagan about how they discovered the Earth was a sphere, and they even figured out the exact size using simple means anyone can use... it's quite good.
https://youtu.be/3EspZtA7C3o

A really excellent video from Carl Sagan about how they discovered the Earth was a sphere, and they even figured out the exact size using simple means anyone can use... it's quite good. https://youtu.be/3EspZtA7C3o

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