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Grassoline for fuel is a concept that is under development in the ongoing search for an alternative to oil. Learn about the concept of grassoline.

A common female ancestor could be what all humans can trace their lineage to. Learn more about the common female ancestor and Mitochondrial Eve.

Tipping is a multibillion-dollar industry that varies around the globe. Learn more about how tipping works in the United States and internationally.

Could 'energy crops' really be the end to our addiction to fossil fuels? Read about the 10 top biofuel crops at HowStuffWorks.

If you're a dedicated gardener which a penchant for exotic plants, it's possible to make a bog garden in your backyard. Learn about bog gardens.

The top 10 rare books may surprise you. Visit HowStuffWorks to learn the top 10 rare books.

MotionScan technology adds more life-like features to animated figures. Take a look behind the scenes at MotionScan technology to learn more.

Do you know which things you should buy in bulk? Check out the top 10 things you should buy in bulk in this article from howstuffworks.com.

How much do you understand sinus congestion? Learn about sinuses and what causes sinus congestion in this HowStuffWorks article.

Made of plain pine or shaped like a shoe, mourners may inter them, suspend them or set them ablaze. How much do caskets and coffins differ?

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