10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
Even Antarctica has an area code. It's 672.
58
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The Caspian Sea is also classed as the world's largest lake.
52
There are approximately three chickens for every human on Earth.
13