References

  • What Are Gamma-Rays?

    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?

    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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  • Sloths: The World's Slowest Mammals

    Sloths: The World's Slowest Mammals

    November 26, 2018 | Reference

    Sloths spend most of their time sleeping and eating in the tropical rainforests of South and Central America.
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  • Ochre: The World's First Red Paint

    Ochre: The World's First Red Paint

    November 20, 2018 | Reference

    Artists have used ochre — a naturally occurring pigment that has hues ranging from yellow to red to purple-brown — to paint for hundreds of thousands of years.
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  • What Is Brain Freeze?

    What Is Brain Freeze?

    November 20, 2018 | Reference

    What is happening when something as lovely as ice cream causes such awful pain?
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  • What Is Virotherapy?

    What Is Virotherapy?

    November 19, 2018 | Reference

    Viruses are now being developed to attack cancer cells. Here's how they work.
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  • What Is Chickenpox? Causes, Symptoms & Treatment

    What Is Chickenpox? Causes, Symptoms & Treatment

    November 16, 2018 | Reference

    Chickenpox is a viral infection that's easily prevented by a highly effective vaccine.
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  • What Are CT Scans and How Do They Work?

    What Are CT Scans and How Do They Work?

    November 14, 2018 | Reference

    A computed tomography (CT) scan is a quick and painless way to diagnose an injury, abnormality or disease.
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  • What Is Inflammatory Bowel Disease?

    What Is Inflammatory Bowel Disease?

    November 07, 2018 | Reference

    Inflammatory bowel disease (IBD) is a condition that involves chronic inflammation in all or part of the digestive tract.
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  • What Is Salmonella?

    What Is Salmonella?

    November 07, 2018 | Reference

    Salmonella causes an unpleasant bacterial infection that usually occurs after the person consumes a contaminated food or beverage. Although the symptoms are miserable, most people recover quickly with hydration and rest.
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