The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
More than 25% of the world's forests are in Siberia.
51
The Caspian Sea is also classed as the world's largest lake.
52
It's still possible to see the division between East and West Germany due to different light bulbs.
5
Europe is the only continent without a desert.
62
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
