The average ice berg weighs 20,000,000 tons!
54
Forest fires move faster uphill than downhill.
52
The Sahara desert expands at about 1km per month.
90
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
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
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119