There's a lake under Antarctica that is 25 million years old called Lake Vostok.
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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
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The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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Even Antarctica has an area code. It's 672.
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The Niagara Falls moves upstream at an average rate of about 295ft a century!
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The North Atlantic gets 2.5 centimetres (1in) wider every year.
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Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
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