The state with the longest coastline in the Continental U.S. is Michigan.
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Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
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One cubic mile of seawater contains about 50 pounds of gold.
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Australia's Great Barrier Reef is 1,250 miles long!
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The North Atlantic gets 2.5 centimetres (1in) wider every year.
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The city of Houston, Texas is built on a swamp and is slowly sinking!
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The average ice berg weighs 20,000,000 tons!
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