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
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
41
In 1850, only 8% of the people in California were women.
0
There are more than 50,000 earthquakes throughout the world every year!
47
Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).
25