An acre of trees can remove about 13 tons of dust and gases every year from the surrounding environment.

There are more than 1,000 chemicals in a cup of coffee. Of these, only 26 have been tested, and half-caused cancer in rats.

When telephone companies first began hiring telephone operators, they chose teenage boys for the job. They switched to women because the teenage boys were wrestling instead of working and pulling pranks on callers.

AMAZING FACTS