The number of possible ways of playing the first four moves per side in a game of chess is 318,979,564,000.
Most chemical drain openers open blocked drains by eating and boiling their way through the clog. Obviously, chemicals strong enough to dissolve grease, hair, paper, and other items can do great damage to your eyes, lungs, and skin. Accidentally swallowing even a small amount of drain opener can result in grave injuries or death.
There are eight time zones in North America.
The gorge of the Grand Canyon is 217 miles long. 56 of those miles are in the Grand Canyon National Park in Arizona. The canyon varies in width from 4 to 18 miles.
It takes 17 muscles in your face to smile, 43 to frown.