Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
41
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.
17
Australia's Great Barrier Reef is 1,250 miles long!
45
Mexico City is built on top of an underground resevoir!
47
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
There are more than 50,000 earthquakes throughout the world every year!
47
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
The Atlantic Ocean is saltier than the Pacific Ocean.
54