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Impression evidence is an important and sometimes overlooked aspect of the criminal investigation process. Find out about impression evidence here.

Truck brakes have to be big and powerful to stop the truck and its payload. Learn all about truck brakes at HowStuffWorks.

The thyroid gland works to communicate with various parts of the body. Learn more about the thyroid gland and how it sends messages.

To remove a computer virus, you first need to know if you actually have a virus. Then, take a look at these steps on how to remove a computer virus.

How can a machine match a paint color perfectly? A spectrophotometer is your answer. Learn more how this machine can match paint.

Driver safety, employee training and college courses are now being offered in a virtual environment. Learn how these virtual classrooms work.

Founded in 1937 to build aircraft, Saab turned its postwar attention to making reliable luxury and sports cars. Learn more about Saab sports cars.

Checker was known for making taxicabs, but it started selling civilian models, such s the Superbra, in 1959. Learn about Checker car beginnings.

Aerated lawns can be healthier lawns if aeration is done right. Learn how aerated lawns relieve compacted soil and get grass breathing again.

Camper towing is easy if you know what you're doing. Read all about camper towing at HowStuffWorks.

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