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Green Flash: The Beautiful and Elusive Sunset Phenomenon

January 03, 2019 | Reference

Sometimes, at sunset, the sun appears to suddenly and briefly change color. Blink, and you'll miss it.
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All About Apples: Health Benefits, Nutrition Facts and History

December 12, 2018 | Reference

An apple a day may really keep the doctor away, as these fruits are low in calories and high in fiber, have only a trace of sodium and no fat.
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Polonium: A Rare and Highly Volatile Radioactive Element

December 06, 2018 | Reference

Polonium was a critical ingredient in the first atomic bomb and it's a suspected poison in more than one high-profile death.
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Hand, Foot and Mouth Disease: Causes, Symptoms and Treatment

December 06, 2018 | Reference

Hand, foot and mouth disease can spread quickly across child care centers and elementary schools. Here's what to look for and how to manage the disease.
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What Is X-Ray Spectroscopy?

December 05, 2018 | Reference

X-ray spectroscopy is used in many areas of science, medicine and technology, to better understand the characteristics of a material at the atomic level.
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Carnivores: Facts About Meat Eaters

December 04, 2018 | Reference

A carnivore is an animal or plant that eats the flesh of animals.
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Centipedes and Millipedes: Lots of Legs, What's the Difference?

December 04, 2018 | Reference

At first glance, centipedes and millipedes look alike with their numerous legs. But there are a few key differences between these squirmy creatures.
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Shingles: Causes, Symptoms and Treatment

December 03, 2018 | Reference

Shingles, also called herpes zoster, is a viral disease that can cause a painful, blistering rash, which usually appears on one side of the body. It's caused by the same virus that causes chickenpox.
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What Are Gamma-Rays?

November 29, 2018 | Reference

Gamma-rays are a form of electromagnetic radiation. They can be used to treat cancer, and gamma-ray bursts are studied by astronomers.
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What Are Amphetamines?

November 28, 2018 | Reference

Amphetamines are powerful central nervous system stimulants derived from the ephedra plant. They're used to treat disorders such as ADHD, narcolepsy and obesity. However, they can also be highly addictive and have harmful side effects.
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