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How many countries are in Europe? It depends on how you define the continent and what counts as a country.

The NLOS cannon can fire rounds from far away with less collateral damage. Read about NLOS cannon and its role in future military warfare.

Legend has it that the Great Chicago Fire started with Mrs. O'Leary's cow and a lantern in the shed. Did a cow really start the Great Chicago Fire?

Zombie debt is debt that has been proclaimed uncollectable by a lender, who then sells it to a collection agency. Learn more at HowStuffWorks.

Celiac disease is an autoimmune disorder -- more than just a food allergy to gluten. Read about celiac disease, symptoms and treatment.

Lab-grown skin can improve the survival odds of someone with a serious third-degree burn. See how lab-grown skin is made and how it works.

Graham debuted a barrage of cars after their inception, from town cars to limousines. Learn how the public reacted to this automotive newcomer.

Oil speculation can raise gas prices in an unstable market, but how does this happen exactly? Find out why oil speculation can raise gas prices.

The 1915 Cadillac V-8, Type 51 blew past the six-cylinder engines of its competitors to lead a revolution. Learn about the 1915 Cadillac V-8.

Your back pain may be debilitating, but is it bad enough to undergo laser spine surgery? Find out all the facts on laser spine surgery.

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