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What Is Melanin?

Melanin is the body’s own natural pigment. It is a substance that is responsible for giving the skin and hair its color. Melanin is also responsible for the colors that we see in the iris of the eye – and in animals, the feathers and scales. Generally, people with dark skin possess higher levels...

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What Is Zeaxanthin?

Zeaxanthin is one of two carotenoids in the retina of the human eye where it plays a role in the central macula. Zeaxanthin is a yellow phytonutrient pigment located in many fruits and vegetables such as lettuce, broccoli, goji berry, kale, turnip greens, collard greens, kiwifruit, and Brussel...

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What Is Nitrogen?

Nitrogen is a chemical element that is crucial in sustaining the Earth’s atmosphere and all life. In fact, about 80% of the atmosphere is made of nitrogen. It plays, literally, such a big part in life that scientists say that it is the seventh most abundant chemical in the universe....

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What Is Oleic Acid?

Oleic acid is a kind of fatty acid. It is naturally extracted from plants and in some animals. It can also be found in some egg and butter substitutes. Oleic Acid is mono unsaturated, and is ranked as a “healthy fat.” It can help control a person’s cholesterol levels and increase the “good”...

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What Is Sodium Benzoate?

Sodium benzoate is a kind of salt. It can be found in many foods, since it is used as a preservative. However, it is not frequently used as a flavoring, since too much can give the food and drinks a distinctly flavor. About 7 out of 10 people will detect sodium benzoate when it is added to food...

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What Is Sleet?

The word “sleet” is generally associated with winter, but its exact meaning varies. For Europeans, sleet means half-melted snow that has not yet reached the ground. For Americans, however, it’s wet snow that’s already accumulated (to their dismay) on streets, driveways and fields. In other words,...

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Fiji Cyclone "Tomas" Causes Destruction

Fiji was struck a category four cyclone meteorologists have coined "Tomas" caused 5,000 residents to evacuate. The cyclone hit northern Fiji, destroyed buildings and crops, displaced thousands with winds up to over 100 miles per hour or 170 km. The storm has forced schools and public services...

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What Is the Butterfly Effect?

How can the wing movements of a butterfly affect the weather system of a country on the other side of the world? It doesn’t seem possible, but proponents of the Chaos Theory use this—the “Butterfly Effect”—to illustrate how small variations can have monumental impact on large, complex systems....

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Oriental Yeti Trapped

The Orential Yeti was trapped by hunters in the Sichuan Province in China. Scientists are baffled by this unidentified breed of animal. Hunter Lu Chin, who found the hairless creature in a remote section of central China, described the beast to Britain's Times as "a bit like a bear but it doesn't...

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What Is a Lie Detector Test?

In an effort to determine if an individual is being honest, he or she can undergo a lie detector test. Such a test involves measuring the individual’s response to questions posed by an examiner. The answers provided are measured by physiological responses and are later evaluated and analyzed by a...