If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The Caspian Sea is also classed as the world's largest lake.
52
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
One cubic mile of seawater contains about 50 pounds of gold.
79
The water between India and Sri Lanka is only 3-30 feet deep and was purportedly passable on foot until 1480 AD when a cyclone moved some sand around.
1
The state with the longest coastline in the Continental U.S. is Michigan.
31

