The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
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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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Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
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More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
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The Atlantic Ocean is saltier than the Pacific Ocean.
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Australia's Great Barrier Reef is 1,250 miles long!
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Israel's Dead Sea is 1,312 feet below sea level.
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