How Easter Islanders put 13-ton hats on statues

The video explores how stone hats were placed on Moai statues using ramps. Scientists created 3D models to analyze the stone cylinders and developed a hypothesis that the hats were rolled up ramps using a technique called Par Buckling. Calculations determined the ramp length and number of workers needed. A team of 15 could position a hat using a ramp 75 to 328 feet long with a 5 to 20-degree incline.

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