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Thymus: Facts, Function & DiseasesThe thymus is the source of T-cells. The body uses T-cells to help destroy infected or cancerous cells.
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Adenoids: Facts, Function & TreatmentThe adenoids are one type of tonsils. They are found only in children, and shrink over time until they disappear by adulthood.
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Rachel Carson: Life, Discoveries and LegacyRachel Carson challenged the use of pesticides and sparked an environmental revolution.
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Lise Meitner: Life, Findings and LegacyLise Meitner was a pioneering physicist who discovered nuclear fission. Her contributions have often been overlooked.
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Facts About RhinosTheir horns are made of the same stuff as human fingernails!
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Facts About the JFK Assassination -
Chinese New Year: celebrate the coming of springThe Lunar New Year is one of the world's most celebrated festivals.
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Niacin (Vitamin B3): Benefits & Side EffectsNiacin is an essential vitamin that helps the digestive system, skin and nervous system to function.
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Lungs: Facts, Function and DiseasesLungs are an important part of the respiratory system. Adults take 15 to 20 breaths a minute, which comes to around 20,000 breaths a day.
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Russian Culture: Facts, Customs & TraditionsRussian culture has a long and rich history, steeped in literature, ballet, painting and classical music. Here is a brief overview of Russian customs & traditions.
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Facts About AlpacasAlpacas are domesticated versions of a South American ruminant called the vicuña. There are no alpacas in the wild.
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What Is Synesthesia?Synesthesia is a neurological condition that causes the brain to process data in the form of several senses at once; for example, hearing sounds while also seeing them as colorful swirls.
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What Is a Polymer?Polymers are materials made of long, repeating chains of molecules. There are natural and synthetic polymers, including proteins and rubber, and glass and epoxies.
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Sprains: Causes, Treatment & PreventionA sprain happens when a ligament gets stretched or torn. The most common type is an ankle sprain.
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Rams: Facts About Male Bighorn SheepRams are male bighorn sheep. They have long, curved horns that they use to fight for dominance.
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Facts About DeerThere are 47 species of deer, including caribou, elk, moose and wapiti.
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Jaguar Facts: Biggest Cat in AmericasJaguars are large cats that can be found in North, Central and South America. They are identified by their yellow or orange coats, dark spots and short legs.
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Foxes: Facts & PicturesFoxes are found all over the world. In folklore, foxes are typically characterized as cunning creatures sometimes having magical powers.
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Giraffe Facts & PhotosThey're the tallest animal on Earth with necks that are 6 feet tall!
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Thyroid Cancer: Symptoms, Diagnosis & TreatmentThe number of thyroid cancer cases has more than tripled in the past 40 years.
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Facts About GeckosThere are about 1,500 species of geckos, a type of lizard found all over the world.
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Facts About BisonThe American bison is the official mammal of the United States and is the largest mammal in North America.
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Causes of Global WarmingSince the late 1700s, the world's climate has been changing rapidly, mostly due to human causes.
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Scabies: Causes, Symptoms & TreatmentScabies is a skin condition caused by a microscopic mite. Symptoms include itching and red bumps or blisters.
