Australia's Great Barrier Reef is 1,250 miles long!
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It's still possible to see the division between East and West Germany due to different light bulbs.
5
It takes a drop of ocean water more than 1,000 years to circulate around the world.
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Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
One cubic mile of seawater contains about 50 pounds of gold.
79
Mexico City is built on top of an underground resevoir!
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