The Amazon rainforest produces more than 20% the world's oxygen supply.
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In 1850, only 8% of the people in California were women.
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Australia's Great Barrier Reef is 1,250 miles long!
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The state with the longest coastline in the Continental U.S. is Michigan.
31
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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The Atlantic Ocean is saltier than the Pacific Ocean.
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The Niagara Falls moves upstream at an average rate of about 295ft a century!
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