If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
There are approximately three chickens for every human on Earth.
13
It's still possible to see the division between East and West Germany due to different light bulbs.
5
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The state with the longest coastline in the Continental U.S. is Michigan.
31