An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The Sahara desert expands at about 1km per month.
90
Even Antarctica has an area code. It's 672.
58
The Caspian Sea is also classed as the world's largest lake.
52
Mexico City is built on top of an underground resevoir!
47
The Atlantic Ocean is saltier than the Pacific Ocean.
54
The state of Florida is bigger than England!
74
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14