The average ice berg weighs 20,000,000 tons!
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The Atlantic Ocean is saltier than the Pacific Ocean.
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A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
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Check your map! Virginia extends farther west than West Virginia.
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The Niagara Falls moves upstream at an average rate of about 295ft a century!
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The city of Houston, Texas is built on a swamp and is slowly sinking!
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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
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