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
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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