If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
The state with the longest coastline in the Continental U.S. is Michigan.
31
Forest fires move faster uphill than downhill.
52
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
One cubic mile of seawater contains about 50 pounds of gold.
79