The Atlantic Ocean is saltier than the Pacific Ocean.
54
There are approximately three chickens for every human on Earth.
13
Europe is the only continent without a desert.
62
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
The Sahara desert expands at about 1km per month.
90
The Caspian Sea is also classed as the world's largest lake.
52