A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62