An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The water of the Antarctica is so cold that nothing can rot there.
334
The Sahara desert expands at about 1km per month.
90
Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
41
The state with the longest coastline in the Continental U.S. is Michigan.
31
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62