The Amazon rainforest produces more than 20% the world's oxygen supply.
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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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Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
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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.
40
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
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