The Amazon rainforest produces more than 20% the world's oxygen supply.
182
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Even Antarctica has an area code. It's 672.
58
The Sahara desert expands at about 1km per month.
90
The average ice berg weighs 20,000,000 tons!
54
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243