There's a lake under Antarctica that is 25 million years old called Lake Vostok.
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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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The state with the longest coastline in the Continental U.S. is Michigan.
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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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Australia's Great Barrier Reef is 1,250 miles long!
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Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
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10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
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