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Too bad the early Romans had a working mechanism over 2000 years ago. Kinda shoots holes in your statement, eh?
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Actually no, that kinda shoots holes in your statement. Basing your information and evidence off of a 2000 year old model is not something many would consider very reliable. Do you also believe in Zeus? Modern science has allowed us to accurately test hypothesis' regarding the shape of the earth which we inhabit among other things, this means we no longer need to make random guesses as the Romans once did.