Israel's Dead Sea is 1,312 feet below sea level.
48
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
Forest fires move faster uphill than downhill.
52
Europe is the only continent without a desert.
62
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
More than 25% of the world's forests are in Siberia.
51