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
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Even Antarctica has an area code. It's 672.
58
The Atlantic Ocean is saltier than the Pacific Ocean.
54
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The state with the longest coastline in the Continental U.S. is Michigan.
31
Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
14
Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).
25