Mexico City is built on top of an underground resevoir!
47
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
It's still possible to see the division between East and West Germany due to different light bulbs.
5
