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You may remember from math class that a prime number is a number that can only be divided by 1 and itself. But why are they important anyway?

How to draw evening dresses is presented at HowStuffWorks. Learn how to draw evening dresses.

Can tweezing damage my skin? Visit HowStuffWorks to learn if tweezing can damage your skin.

Does my scalp affect the way my hair looks? Visit HowStuffWorks to learn if your scalp affects the way your hair looks.

Only four 1954 Packard Panther Convertible concept cars were produced. See pictures and learn more about the 1954 Packard Panther convertible.

The 1978-1979 Dodge Li'l Red Truck was the original muscle truck. See pictures and get valuable information on the 1978-1979 Dodge Li'l Red Truck.

The 1960-1963 Ford Falcon Ranchero was a compact-sized car-pickup blend. See pictures and learn about the collectible 1960-1963 Ford Falcon Ranchero.

The sharply-styled 1955 Alfa Romeo Bertone BAT 9 looked and drove like the car of the future. Read more about the 1955 Alfa Romeo Bertone BAT 9.

The Suicide Softail motorcycle has a 6-speed Baker transmission and a powerful engine. See photos and specifications for this Ultima-powered chopper.

Low Blow is a custom motorcycle with a 124-cubic-inch V-twin engine built by Thee Darkside of Daytona. Learn more about this super-powered chopper.

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