It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
The Sahara desert expands at about 1km per month.
90
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
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
It's still possible to see the division between East and West Germany due to different light bulbs.
5