An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
It's still possible to see the division between East and West Germany due to different light bulbs.
5
In 1850, only 8% of the people in California were women.
0
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
Forest fires move faster uphill than downhill.
52
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62