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Did humans create the Sahara Desert?

New research investigating the transition of the Sahara from a lush, green landscape 10,000 years ago to the arid conditions found today, suggests that humans may have played an active role in its desertification.

A material that most liquids won't wet

(Phys.org)—A nanoscale coating that's at least 95 percent air repels the broadest range of liquids of any material in its class, causing them to bounce off the treated surface, according to the University of Michigan engineering ...

Ancient sewer excavation sheds light on the Roman diet

(PhysOrg.com) -- Archaeologists working in a system of connected sewers and drains under the ancient town of Herculaneum in the Bay of Naples area of Italy have analyzed the human excrement found there and discovered the ...

Brown University chemists simplify biodiesel conversion

As the United States seeks to lessen its reliance on foreign oil, biodiesel is expected to play a role. According to the National Renewable Energy Laboratory, a branch of the Department of Energy, biodiesel "represents a ...

Scientists unveil chocolate-fueled race car

(AP) -- Scientists unveiled on Tuesday what they hope will be one of the world's fastest biofuel vehicles, powered by waste from chocolate factories and made partly from plant fibers.

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Vegetable

A vegetable is an edible plant or part of a plant other than a sweet fruit or seed. The word is not scientific, however, but instead is largely based on culinary and cultural tradition. Thus the application of the word is somewhat arbitrary and subjective. For example, some people consider mushrooms to be vegetables while others consider them a separate food category.

Some vegetables can be consumed raw, and some may (or must) be cooked in various ways, most often in non-sweet (savory or salty) dishes.[citation needed] However, some vegetables are often used in desserts and other sweet dishes, such as pumpkin pies and carrot cakes.

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