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Why Do Dogs Have Whiskers?
April 14th, 2014
For humans, touch is a sense most often associated with the fingers. But man's best friend, the dog, touches the world a different way — with his face.
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How Do Clouds Form?
April 11th, 2014
When the sun heats water in the oceans, rivers, lakes and other sources, some of it evaporates, or transforms from liquid water to water vapor. This is the first step in cloud formation.
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What Is Xanthan Gum?
April 9th, 2014
Xanthan gum helps salad dressing pour easily from the bottle, makes ice cream taste creamier and allows liquid cosmetics to stay blended while on the shelf.
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What Is Normal Blood Sugar?
March 31st, 2014
Blood sugar, or glucose, is an important source of energy and provides nutrients to your body's organs, muscles and nervous system.
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What Is Kombucha?
March 27th, 2014
What smells like beer, tastes like carbonated vinegar and looks like something you forgot in the back of the refrigerator? Why, kombucha tea, of course!
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Why Is the Ocean Blue?
March 19th, 2014
It's commonly believed that the ocean is blue because it's reflecting the blue sky. But this is a misconception.
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Why Do Teeth Turn Yellow?
March 19th, 2014
While celebrities and models may sport pearly white teeth, the smiles of most people are a tad duller. But this shouldn't be too surprising: A number of different things can affect the color of your teeth and turn them that dreaded yellow hue.
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What Is Jet Lag?
February 27th, 2014
Jet lag results from disruptions to the body's "clock" or natural, circadian rhythms. This internal clock — which runs on an average 24.1-hour schedule — controls sleep, wakefulness and a host of other physiological processes.
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How Do You Get Herpes?
February 25th, 2014
A herpes infection is caused by the herpes simplex virus (HSV), which comes in two forms: HSV-1, which usually results in oral herpes infections affecting the mouth and lips; and HSV-2, which usually causes genital herpes affecting the genitals and anus.
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Why Do My Nipples Hurt?
February 24th, 2014
There's a reason nipples are considered one of the most erogenous zones of the human body. These sensitive body parts are easily stimulated and easily irritated, and there are many reasons why a person might feel nipple pain.
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What Is Kefir?
February 14th, 2014
Imagine yogurt in a drinkable form, and with bubbles. If you can picture that, you've got a decent idea what kefir is.
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What Is Dew Point?
February 11th, 2014
Compared to relative humidity, dew point is frequently cited as a more accurate way of measuring the humidity and comfort of air, since it is an absolute measurement (unlike relative humidity).
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How Do Dolphins Sleep?
April 14th, 2014
Dolphins sleep with one eye open, and with half their brain wide awake, researchers have found.
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What Is Dry Socket?
April 11th, 2014
If you've ever had a tooth pulled, then you might be familiar with a severely painful — and aptly named — condition known as dry socket (alveolar osteitis).
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How Do Peanuts Grow?
March 31st, 2014
Despite their name and appearance, peanuts are not tree nuts like walnuts and pecans — they're part of the legume family of plants, which includes beans, lentils, peas and other familiar foods.
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What Is Jock Itch?
March 31st, 2014
Itchy, contagious and in a place you'd rather not mention, jock itch (tinea cruris) is a fungal skin infection that affects the genital region.
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What Is Ketosis?
March 25th, 2014
Ketosis is a temporary physical condition marked by elevated levels of compounds known as ketone bodies in the body's tissues and fluids.
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How Do Antibiotics Work?
March 19th, 2014
In 1929, bacteriologist Alexander Fleming discovered the first true antibiotic, penicillin, ushering in a new age of medicine. Since then, scientists have found dozens of antibiotics, which fight bacteria in a variety of ways.
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What Gravitational Ripples from Big Bang Mean for Physics
March 18th, 2014
The discovery of ripples in space-time from the mysterious earliest moments after the Big Bang is not only a "smoking gun" for the universe's rapid expansion but also could have important implications for physics.
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What Is Flex Fuel?
February 26th, 2014
A flex-fuel vehicle (FFV) is a vehicle with an internal combustion engine capable of operating on a mixture of fuels, typically gasoline and ethanol.
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What Is Gelato?
February 24th, 2014
If you think gelato is just the Italian equivalent of ice cream, think again. The frozen treat contains less fat, less air and is served at a higher temperature than conventional ice cream, lending it a more intense, concentrated flavor.
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Is Coffee Bad For You?
February 20th, 2014
Coffee has both positive and negative effects on the body and mind, but the benefits appear to outweigh the harms for most people.
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Why Do Freezing Pipes Burst?
February 14th, 2014
Bursting water pipes are a major concern when winter temperatures drop below freezing. But why do freezing pipes burst?
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What Is Communism?
January 30th, 2014
Though the term "communism" can refer to specific political parties, at its core, communism is an ideology of economic equality through the elimination of private property.
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What Is Quinine?
April 14th, 2014
Found in the bark of the cinchona tree, quinine is a compound with many medicinal applications, including fever-reducing, painkilling and anti-inflammatory properties. It was also the first treatment for malaria.
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What Is Credit Card Skimming?
April 11th, 2014
The FTC estimates that 9 million Americans have their identity stolen every year in credit-card skimming or similar kinds of scams. The ease with which skimmers operate, however, raises several questions about the security of card transactions.
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How Do Pineapples Grow?
March 31st, 2014
Contrary to what some people think, pineapples don't grow on trees — they grow out of the ground, from a leafy plant.
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What Is Neuropathy?
March 27th, 2014
Peripheral neuropathy (often referred to simply as "neuropathy") refers to any condition that damages or disrupts nerves in the peripheral nervous system.
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Why Do We Sneeze?
March 25th, 2014
Sneezing — or as it's known in the medical community, sternutation — occurs when the respiratory epithelium that lines the nose is irritated.
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Why Do Cats Have Whiskers?
March 19th, 2014
Men might grow a mustache just for extra style points, but the facial hair of the cat has nothing to do with fashion. Whiskers are highly sensitive tactile hairs that grow in ordered patterns on a cat's muzzle, above its eyes, and elsewhere on its body.
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Does Sugar Really Cause Cavities?
March 13th, 2014
You've probably heard it all your life: Eating sweets will rot your teeth. But while a diet high in sugar certainly promotes the formation of cavities (as well as other medical problems), sugar itself isn't the real culprit behind tooth decay.
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What Is Diverticulitis?
February 25th, 2014
Diverticulitis, a condition that can cause severe and sudden pain in the abdomen, affects the digestive system.
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What Is a Vegan?
February 24th, 2014
The primary motivation behind veganism is to reduce harm to all living creatures. It is "compassion in action," according to the American Vegan Society.
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What Is an Amber Alert?
February 18th, 2014
The AMBER alert system — an early warning system that helps police locate abducted children — was developed in 1996 as a collaboration between Dallas-area broadcasters and local police.
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How Do You Get Pink Eye?
February 11th, 2014
Pink eye, also known as conjunctivitis, develops when the transparent membrane, or conjunctiva, lining the eyelid and the white part of the eyeball gets inflamed. You can get pink eye from someone else if their bacterial or viral infection passes to you.
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When Was Jesus Born?
January 30th, 2014
Although millions of people celebrate the birth of Jesus Christ on Dec. 25, most scholars agree that he wasn't born on that day, or even in the year 1 A.D.
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