The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
Every year, Alaska has about 5,000 earthquakes.
31
There are approximately three chickens for every human on Earth.
13
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
One cubic mile of seawater contains about 50 pounds of gold.
79
Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).
25