25 September 2013, 04:22 PM ET
Native to South and Central America, quinoa is an herb (not a grain). Quinoa seeds are traditionally used in soups, made into beer and ground into meal for making porridges and cakes. Its rich nutrient quality make quinoa a "superfodd."
25 September 2013, 03:40 PM ET
Many people mistakenly say "vertigo" when they mean fear of heights or simple dizziness. But in medical circles, vertigo refers specifically to a false sensation of movement, usually caused by inner-ear problems.
23 September 2013, 04:40 PM ET
For sex to result in a pregnancy, a woman has to go through ovulation. Part of the monthly menstrual cycle, ovulation happens when an egg, or ovum, becomes available for fertilization by a sperm cell.
23 September 2013, 02:49 PM ET
It may be alarming to see green poop in your toilet bowl, but it isn't necessarily a cause for concern.
23 September 2013, 02:30 PM ET
A number of hypotheses exist to explain why we yawn, but scientists have yet to come to a consensus about the phenomenon.
19 September 2013, 02:37 PM ET
Founded in 1953 by the science-fiction writer L. Ron Hubbard, Scientology is a philosophy and set of religious beliefs centered around the principles of self-understanding and self-improvement.
18 September 2013, 05:27 PM ET
UFOs visit a small town in Argentina, a red-eyed winged beast terrorizes a town in West Virginia, and a bizarre disease afflicts people with inexplicable lesions, in a new Science Channel series.
18 September 2013, 02:26 PM ET
The minimum-wage debate has resurfaced with a vengeance in recent months in the United States, resulting in strikes and protests by service workers at popular fast-food restaurants. But what is the minimum wage and how does it apply to American workers?
17 September 2013, 05:27 PM ET
Gluten refers to the proteins found in wheat endosperm. Some people are gluten-intolerant, meaning their bodies produce an abnormal immune response when it breaks down gluten from wheat and related grains during digestion.
28 August 2013, 05:12 PM ET
Whether you know it as Newton's Cradle or the Executive Ball Clicker, chances are you've seen the educational desk toy that seems to defy explanation. The device consists of a row of five metal balls suspended by wires.
28 August 2013, 04:41 PM ET
There are a lot of tall tales surrounding tornadoes, only some of them rooted in fact. One popular story suggests that the strong winds of a tornado could can blow a single piece of straw straight into a tree trunk.
28 August 2013, 02:22 PM ET
Most people with allergies first develop them as children or infants. But as they age, some individuals leave their hay fever, pet allergies and or even food allergies behind in the playground.
28 August 2013, 01:56 PM ET
Blessed with fangs and claws, dogs and cats clearly prefer meat. Still, both pets will nibble and even ingest plants. Since some greenery is toxic, which plants should pet owners avoid?
28 August 2013, 11:32 AM ET
Mustard gas, or sulfur mustard, is a chemical agent that causes severe burning of the skin, eyes and respiratory tract. It can be absorbed into the body through inhalation, ingestion or by coming into contact with the skin or eyes.
27 August 2013, 05:20 PM ET
The phenomenon, known as a hypnogogic jerk, is named in reference to the hypnogogic state — the transitional period between wakefulness and sleep. Hypnagogic jerks are also commonly known as hypnic jerks or sleep starts.
27 August 2013, 04:31 PM ET
Centuries-old tales have described severed heads that seemed to live for a few seconds — blinking, changing expressions, even attempting to speak. Compelling as these stories may be, many physicians would call this horrifying possibility highly unlikely.
26 August 2013, 04:48 PM ET
The coywolf is a coyote-wolf hybrid found throughout eastern North America, from Canada all the way down to Virginia. A 2010 study argued that eastern coyotes should more appropriately be termed "coywolves" to reflect their hybrid origin.
23 August 2013, 05:31 PM ET
Most of the plants you see on a daily basis are green, but every so often you might happen upon the odd purple-leafed tree or shrub. Why do some plants have these purple parts?
22 August 2013, 09:58 AM ET
The bizarre-looking body of an unidentified sea creature washed up on the shores of a Spanish beach last week, setting off wild speculation that some heretofore unknown monster from the deep had been discovered.
21 August 2013, 05:18 PM ET
It's pretty well-known that most clouds are white, while rain clouds are usually a darker shade of gray. But why are rain clouds so dark?
14 August 2013, 05:18 PM ET
To prolong the life of fresh-cut flowers, florists recommend commercial flower preservatives. Homemade vase solutions — using pennies, aspirin, vodka, sugar, 7-UP or bleach — claim to be as good or better. Do any of them work?
13 August 2013, 07:25 PM ET
Lack of evidence has not deterred expeditions in search of a living dinosaur in the jungles of central Africa.
30 July 2013, 05:11 PM ET
"Only eat oysters in months with an 'R.'" This little pearl of folk wisdom carries more truth than you might expect — since the months without the letter R in their names coincide with summer in the Northern Hemisphere.
30 July 2013, 04:21 PM ET
Brown noise is one of the many colors of noise, which also include white noise, pink noise and blue noise. Brown noise is also known as Brownian noise because its change in sound signal from one moment to the next is random.
29 July 2013, 07:47 PM ET
Pink noise is a color of noise, not entirely unlike white noise. Both white and pink noise contain all the frequencies that are audible to humans — 20 hertz to 20,000 hertz — but the way signal power is distributed differs.
29 July 2013, 07:46 PM ET
Sure, that potted fern is pretty, but can it really spruce up the air quality in your home? Plants, including indoor plants, are notoriously adept at absorbing gases through pores on the surface of their leaves.
29 July 2013, 05:34 PM ET
They're small and sweet, so they may seem harmless. But for mysterious reasons, grapes can be toxic for dogs. Recently, vets and dog owners noted that eating grapes or raisins can cause fatal kidney failure in some dogs.
25 July 2013, 09:28 PM ET
Fluorescent lamps, including compact fluorescent lights, use about 75 percent less energy than incandescent bulbs.
But it's widely believed that these popular bulbs use a lot of energy to start up. Should you just leave them on?
25 July 2013, 09:27 PM ET
Sure, birds can fly, but how do they have sex? Can they do it in the air? And where do they keep their reproductive organs? For humans to understand bird sex, they must first put all thoughts of mammalian sex organs out of their heads.
25 July 2013, 12:38 PM ET
In July 2013, China heralded the opening of its New Century Global Center, an immense 18.9 million square-foot building structure that some are calling the largest building in the world. But is China's mega-structure really the world's biggest building?
25 July 2013, 09:13 AM ET
The Hum, a steady, droning sound that's heard in places as disparate as Taos, New Mexico, Bristol, England, and Largs, Scotland, affects only a small percentage of the population in those areas. What causes the Hum remains a mystery.
24 July 2013, 08:10 PM ET
As a child, you may have been told that an earthworm will regenerate into two new worms if it's cut in half. But if you've ever experimented with the tube-like animals, you've probably been disappointed.