A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
In 1850, only 8% of the people in California were women.
0
The state with the longest coastline in the Continental U.S. is Michigan.
31
The Sahara desert expands at about 1km per month.
90
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
Every year, Alaska has about 5,000 earthquakes.
31