The USA Forest Service has built more than 360,000 miles of various kinds of roads in national forests -- or eight (8) times the entire length of the U.S. interstate highway system.

Cave rats make urine trails throughout the deep, dark caverns of the caves, which tell the rats how to find their way in the dark.

Using recycled aluminum cans and making news cans out of them saves 75% energy compared to making it from new material.

A M A Z I N G   F A C T S