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Leprosy, or Hansen's disease, was the AIDS of the first millennium. Find out how leper colonies (leprosaria) worked at HowStuffWorks.

Who invented the x-ray is explained in this article from HowStuffWorks. Find out who invented the x-ray.

Are you wondering about the history of peanut butter and jelly? Check out this article and learn about the history of peanut butter and jelly

Nope, it's not the police code for marijuana possession. It has a much cooler origin story. Find out about the meaning of 420.

What does an executive producer do? Check out HowStuffWorks for lots of detailed information of the responsibilities of an executive producer.

Pulled an all-nighter last night? You're a danger to yourself and others. Find out why sleep deprivation is such a hazard.

Trace the economy's path from subprime collapse to the mortgage crisis to the credit market crisis. Check out our Recession Pictures.

Are you wondering how to cook a perfect holiday ham? Check out this article and learn how to cook a perfect holiday ham.

Are you wondering how to throw a holiday grilling party? Check out this article and learn how to throw a holiday grilling party.

Are lab rats really prone to cancer? Find out whether lab rats are really prone to cancer at HowStuffWorks.

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