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Why Do People Keep Their Accents?
September 8th, 2014
Most infants begin learning a spoken language from the moment they're born. But as the brain becomes less flexible with age, it's difficult for children to master the sounds and intonation of a second language.
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How Do Tornadoes Form?
May 12th, 2014
Tornadoes are one of the most destructive natural forces on Earth. Though scientists don't entirely understand how tornadoes form, they do have a good idea about the conditions that cause tornadoes to develop.
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Why Does Coffee Make You Poop?
May 8th, 2014
It's proven that the caffeine in coffee stimulates the brain, but there's something in a cup of joe that can also jump-start the other end of the body. That's right: Coffee can make you poop.
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Why Do Dogs Wag Their Tails?
April 28th, 2014
It's commonly believed that dogs wag their tails to convey that they are happy and friendly, but this isn't exactly true.
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How Do Enzymes Work?
April 26th, 2014
Enzymes are biological molecules (typically proteins) that significantly speed up the rate of virtually all of the chemical reactions that take place within cells.
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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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Why Is the Sky Blue?
June 9th, 2014
Why is the sky blue? The light coming from the sun is made of many colors, each of which has a different wavelength.
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What Are Sweetbreads?
May 12th, 2014
Contrary to what their name would suggest, sweetbreads are not sugary pastries. So, what are sweetbreads?
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Why Do Cats Like Boxes?
May 8th, 2014
For pet cats, all the toys in the world can't compare to a simple cardboard box.
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Why Do I Bruise Easily?
April 28th, 2014
A contusion, or bruise, is a reddish-purple discoloration of the skin that doesn't blanch, or turn white or pale, when pressed upon.
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What Is Uric Acid?
April 26th, 2014
A byproduct of the metabolic breakdown of purines, uric acid is a human waste product that most people never think about.
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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 Buttermilk?
May 14th, 2014
Today, on National Buttermilk Biscuit Day (May 14), a lot of people may be wondering, what exactly is buttermilk?
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What Do Turtles Eat?
May 12th, 2014
Turtles, like the humans who love them, are a diverse bunch. There are over 300 species of this ancient reptile, and each one has its own preferred diet.
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What Is Kosher Food?
April 29th, 2014
Kosher food is not a style of cooking or a cultural menu (like Chinese or Italian food). Instead, "kosher" refers to foods that adhere to the dietary laws of Judaism, also called kashrut, as described in the Torah.
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How Do Wind Turbines Work?
April 28th, 2014
One of the fastest-growing sources of energy in the world, wind turbines generate electricity without emitting greenhouse gases into the environment (unlike fossil fuels).
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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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