The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
Forest fires move faster uphill than downhill.
52
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
The state with the longest coastline in the Continental U.S. is Michigan.
31
There are more than 50,000 earthquakes throughout the world every year!
47
