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How Do Catapults Work?

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How does the ancient catapult work? It doesn't seem like twisted rope and wooden gears or levers would be able to get up the speed to launch heavy loads a great distance.

Bell Pepper Questions

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Bell peppers are full of nutrients and can be roasted to bring out their inherent sweetness. Get your bell pepper questions answered here.

What if I wanted to build a Great Pyramid today?

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To build a Great Pyramid today you would run into cost and labor issues that didn't exist in ancient Egypt. Learn about building a pyramid today.

Bran Cereals: Natural Weight-Loss Food

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Bran cereals are a quick and delicious fiber source. Discover the benefits of bran, how it promotes weight loss, and ways to dress-up bran meals.

What causes allergic reactions?

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The source of allergies is not mysterious. Simply put, it is the rejection of a non-dangerous substance by your body's immune system. Learn more.

Cabbage: Natural Weight-Loss Food

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Cabbage offers vitamins and fiber, with no fat or cholesterol. Learn how cabbage helps dieters by adding volume with few calories to meals.

Aromatherapy: Eucalyptus

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Eucalyptus can be used in aromatherapy preparations to fight mental fatigue or to infections when applied to the skin. Learn about this essential oil.

How do I follow a very-low-fat vegetarian diet?

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How do I follow a very low fat vegetarian diet? Learn more about following a very low vegetarian diet at Discovery Health.

What is citizen journalism?

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Citizen journalism refers to average citizens or amateurs gathering and spreading the news. What separates citizen journalists from professionals?

Thomas Edison Inventions: What Did He Invent?

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With more than a thousand patents for inventions ranging from light bulbs to cement, Thomas Edison was one of the world's most prolific tinkerers. What did Edison dream up?

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