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There are eight major blood types and some are more common than others. But what's the rarest of them all?

HowStuffWorks looks at the difference between the salary history and the salary requirements question in job interviews and how to answer them.

HowStuffWorks looks at the popularity of quinoa and how it affected farmers who grew it in South America.

Wolf spiders might find their way into your house and can look threatening, but they're really harmless.

What are penny stocks? How do you make money from them and what do you need to be careful of? Find out from HowStuffWorks.

Poison sumac is even more toxic than its cousins, poison ivy and poison oak, in its ability to cause allergic reactions and respiratory problems.

Behind cloud storage is a complicated system for storing your data on countless hard drives and magnetic tapes. Learn more at HowStuffWorks.

Those small donations are big money for nonprofits and the businesses that do the soliciting. But not every shopper likes being asked.

A fire can burn for years, yes years, in a swamp. What's the deal?

When you apply to colleges, they should be accredited or there could be issues. Learn how colleges get accredited at HowStuffWorks.

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