It takes a drop of ocean water more than 1,000 years to circulate around the world.
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The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
Mexico City is built on top of an underground resevoir!
47
Australia's Great Barrier Reef is 1,250 miles long!
45
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
Check your map! Virginia extends farther west than West Virginia.
67