Ask a NASA astronomer! Is there proof that the Earth is round?
7:04
bigthink.com
Ask a NASA astronomer! Is there proof that the Earth is round?
We've known for 2,000 years that the Earth is round. Here are three observable proofs that can instantly debunk flat-Earth theory.
May 22, 2018
Earth radius Circumference
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How the ancient Greeks proved Earth was round over 2,000 years ago
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This measurement is more than 2,200 years old, and its accuracy is remarkable
This measurement is more than 2,200 years old, and its accuracy is remarkable
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