Forest fires move faster uphill than downhill.
52
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
The Sahara desert expands at about 1km per month.
90
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243