Birdwatch Archive

Birdwatch Note Rating

2023-11-28 23:06:57 UTC - HELPFUL

Rated by Participant: 1A2D8B73290180BC079ABC5B8DC90C8F2F385F591E294B451192685F8D39C32A
Participant Details

Original Note:

There are visual proofs of the earth being round, anyone can experiment by looking at a lighthouse at different distances or staring at a boat until it disappeares at the horizon. Eratosthenes used such optical proofs to measure the earth's circumference https://en.m.wikipedia.org/wiki/Eratosthenes

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All Information

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  • helpfulnessLevel - HELPFUL
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