For two-and-a-half millennia, the Parthenon in Greece has been credited with an architectural sleight of hand that contributed to its perfection. Architects and art historians have insisted that its curved base and gently bulging columns were engineered to correct optical illusions — that without such precision, the temple would appear to sag in the middle, much like a deep-bellied hammock. It is a wonderful story about the intellectual legacy of the ancient........

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