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
The state with the longest coastline in the Continental U.S. is Michigan.
31
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
Every year, Alaska has about 5,000 earthquakes.
31
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