Mysteries Archive
14 February 2014, 04:17 PM ET
Bursting water pipes are a major concern when winter temperatures drop below freezing. But why do freezing pipes burst?
11 February 2014, 10:06 AM ET
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.
11 February 2014, 09:50 AM ET
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).
04 February 2014, 05:07 PM ET
Carl Jung's concept of synchronicity can be boiled down to describing "meaningful coincidences."
30 January 2014, 12:39 PM ET
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.
30 January 2014, 11:09 AM ET
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.
29 January 2014, 05:11 PM ET
There's only one group of people who really know what happens when you die: the dead. And since the dead won't be revealing their secrets anytime soon, it's up to scientists to explain what happens when a person dies.
29 January 2014, 04:44 PM ET
The common skin growth called a skin tag, or acrochordon, usually develops in folds of skin and causes little to no harm. Still, these growths can be irritating, and doctors can easily remove them.
27 January 2014, 04:26 PM ET
The universe is made up of matter and energy. What is energy? Matter — anything that has mass and takes up space — is pretty straightforward and easy to grasp, but energy is a bit more abstract.
27 January 2014, 02:55 PM ET
Most studies measuring the rate of hair growth haven't taken into account the race of study participants. A 2005 study found a difference among races in the rate of hair growth. Asian hair grows the fastest, while African hair grows the slowest.
27 January 2014, 01:38 PM ET
Kidney stones form when substances normally found in urine lump together and become solid material within the kidneys. They may remain inside the kidneys or pass through the urinary tract, causing pain and bleeding.
27 January 2014, 01:06 PM ET
The corn-kernel-size caper adds a salty, pungent flavor to salmon dishes, Italian sauces and other foods. But what are capers, a popular dark-green garnish?
21 January 2014, 10:11 AM ET
Ideas about a technology that could connect people via a global, hardwired network have abounded since at least the 1930s. But the information hub that we know today as the Internet traces its origins back to 1958.
17 January 2014, 03:53 PM ET
The surgeon general of the United States is the leading spokesperson on public health issues for the federal government, nominated by the president and confirmed by the U.S. Senate.
15 January 2014, 03:43 PM ET
Technology experts cite various government agencies — as well as a handful of individuals — that have played an instrumental role in inventing what we know today as the Internet.
15 January 2014, 02:01 PM ET
The sun, a massive nuclear-powered star at the center of the solar system, generates the heat and light that sustain life on Earth. But how hot is the sun?
15 January 2014, 11:44 AM ET
When babies start teething, the lower central incisors — the two bottom front teeth — are the first to come in, followed by the upper central incisors. From there, the other incisors, the first set of molars and the canines all grow in.
07 January 2014, 11:23 PM ET
Ogopogo — a creature said to lurk in Canada's Lake Okanagan — is the most likely and best documented of all lake monsters.
20 December 2013, 03:19 PM ET
Cutting is one form of non-suicidal self-injury (NSSI) — also known as self-injurious behavior or non-suicidal self-directed violence — which is the deliberate, self-inflicted destruction of body tissue without suicidal intent.
20 December 2013, 03:01 PM ET
Whey protein is one of the two major proteins (along with casein) contained in milk, and appears in many foods and dietary supplements.
20 December 2013, 02:05 PM ET
Yeasts are microscopic, single-celled organisms belonging to the fungi kingdom — the taxonomic group that also includes mushrooms and mold.
19 December 2013, 12:05 PM ET
If you've purchased a relatively cheap leather sofa, leather-bound books or an inexpensive belt, you might own a bonded-leather item. But what is bonded leather?
19 December 2013, 10:15 AM ET
Sold since 1897, Jell-O has occupied a familiar place on American dinner tables for decades. But what is Jell-O made of?
19 December 2013, 10:00 AM ET
There is no singular definition for clean eating. However, clean eating usually requires eating unprocessed and unrefined products, such as whole grains, lean meats and other foods without artificial ingredients.
16 December 2013, 05:07 PM ET
Drowsiness is a side effect of some antihistamines such as diphenhydramine (Benadryl) and doxylamine succinate (found in Nyquil). And because of their powerful sedating qualities, antihistamines are also the active ingredient in sleep aids.
16 December 2013, 04:40 PM ET
Touted as a promising alternative energy source for decades, solar panels crown rooftops and roadside signs, and help keep spacecraft powered. But how do solar panels work?
16 December 2013, 03:17 PM ET
Named for its use in the process of koshering (or removing blood from meat) in accordance with Jewish dietary laws, kosher salt has a large grain size and lower sodium content per tablespoon than most common table salts.
16 December 2013, 01:05 PM ET
Borax is a naturally occurring mineral powder, which consists of soft, colorless crystals. The mineral is an important compound of the element boron, and goes by a number of scientific names, including sodium borate and disodium tetraborate.
16 December 2013, 11:27 AM ET
While the Coca-Cola Company officially denies the presence of cocaine in any of its products — past or present — historical evidence suggests that the original Coca-Cola did, in fact, contain cocaine.
27 November 2013, 10:49 AM ET
Sweat plays a critical role in helping your body maintain its proper temperature. However, certain people sweat more than others, and excessive sweating can be an indication of an underlying health condition.
25 November 2013, 04:46 PM ET
People have produced distilled water since ancient times via distillation — the process of boiling water in a still, then collecting the condensed steam. Impurities get left behind when the water evaporates.
22 November 2013, 04:55 PM ET
Karma, a Sanskrit word that roughly translates to "action," is a core concept in some Eastern religions, including Hinduism and Buddhism.