Forest fires move faster uphill than downhill.
52
Even Antarctica has an area code. It's 672.
58
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
The Caspian Sea is also classed as the world's largest lake.
52
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
