If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
14
It's still possible to see the division between East and West Germany due to different light bulbs.
5
Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).
25
More than 25% of the world's forests are in Siberia.
51
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119