An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
Even Antarctica has an area code. It's 672.
58
Europe is the only continent without a desert.
62
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
More than 25% of the world's forests are in Siberia.
51