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Old 06-11-2019, 02:45 AM
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Join Date: Oct 2003
Location: Taiwan
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After you drink the first bottle of water, fill with sea water and turn it upside down.

If the draining water rotates clockwise, you are in the northern hemisphere. If it rotates counterclockwise, you are in the Southern Hemisphere.

If it can’t drain because the water can’t decide which way to rotate, you are either exactly in the equator to within feet, or you are starring in the Truman Show.