An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
In 1850, only 8% of the people in California were women.
0
The Sahara desert expands at about 1km per month.
90
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
41
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181