08 October 2013, 06:58 PM ET
Coral reefs are large underwater structures composed of the skeletons of coral, which are marine invertebrate animals.
08 October 2013, 06:43 PM ET
Reiki is a therapy often described as palm healing or hands-on-body healing in which a practitioner places hands lightly on or over a patient's body to treat or cure various ailments.
08 October 2013, 05:43 PM ET
Properties, sources and uses of the element californium.
08 October 2013, 01:12 PM ET
Here's a look at all winners of the Nobel Prize in physics, including Steven Chu, Aage Niels Bohr and Enrico Fermi.
07 October 2013, 05:32 PM ET
Properties, sources and uses of the element berkelium.
07 October 2013, 09:05 AM ET
Here's a look at past winners of the Nobel Prize in Medicine.
03 October 2013, 06:34 PM ET
Studies have shown that devices such as magnetic bracelets have no more benefit than devices without magnets, in essence demonstrating the placebo effect magnets have on their users.
02 October 2013, 04:19 PM ET
Global warming is the gradual heating of Earth's surface, oceans and atmosphere.
02 October 2013, 04:15 PM ET
The consequences of global warming are expected to be far-reaching, long-lasting and, in many cases, devastating.
01 October 2013, 07:12 PM ET
Many different sensors exist to identify elements like acceleration and orientation, and the most popular of this are the accelerometer and gyroscope. But each provides a different set of information.
01 October 2013, 07:07 PM ET
An accelerometer senses motion and velocity to keep track of the movement and orientation of an electronic device.
30 September 2013, 09:33 PM ET
The term "daddy longlegs" can refer to three different types of bugs, and only one of them is a spider.
30 September 2013, 09:18 PM ET
Francis Crick's work unlocked the secret to how genetic material gets passed from parent to child.
30 September 2013, 08:52 PM ET
Crohn’s disease is a chronic inflammatory bowel disease (IBD) that involves inflammation in all or part of the digestive tract.
30 September 2013, 08:05 PM ET
Cadence sensors allow cyclists to better control bike speed and effort for maximized results.
27 September 2013, 05:29 PM ET
Camel spiders are not spiders, and they don't eat camels — or people. These arachnids became infamous after the Gulf War.
27 September 2013, 01:45 AM ET
Alexander the Great's empire stretched from the Balkans to modern-day Pakistan.
27 September 2013, 01:32 AM ET
These solitary spiders like to hide in dark places in the house. Their bite is very venomous.
27 September 2013, 12:56 AM ET
Kelvin is useful in scientific applications because there are no negative numbers. The lowest temperature on the scale is 0 K.
26 September 2013, 11:20 AM ET
Raspberry ketone is touted as a weight-loss aid. But how strong is the evidence that taking raspberry ketone supplements may actually help you lose weight? And is it safe? Here's what experts had to say.
25 September 2013, 07:28 PM ET
There are more than 800 species of these hairy, nocturnal archnids.
25 September 2013, 07:09 PM ET
The accident at the Chernobyl nuclear power plant in Ukraine has been described as the worst nuclear disaster the world has ever seen.
25 September 2013, 06:26 PM ET
Celsius is a measurement of temperature in which 0 degrees represents the freezing point of water, and 100 degrees represents water’s boiling point.
24 September 2013, 06:12 PM ET
The black widow is a species of spider that is known for the females’ unique appearance and venomous bite.
24 September 2013, 05:51 PM ET
Fahrenheit is the temperature scale used primarily in the United States. It sets the freezing point of water at 32 and the boiling point at 212.
24 September 2013, 05:39 PM ET
Properties, sources and uses of the element curium.
23 September 2013, 07:54 PM ET
Mermaids — legendary half-human, half marine creatures — have fascinated people for centuries and inspired many "sightings."
23 September 2013, 07:37 PM ET
Inflammatory bowel disease (IBD) is a condition that involves chronic inflammation in all or part of the digestive tract.
23 September 2013, 06:03 PM ET
Properties, sources and uses of the element americium.
23 September 2013, 05:49 PM ET
Properties, sources and uses of the element plutonium.
20 September 2013, 10:30 PM ET
Temperature is a measurement of how much heat there is in a liquid, solid or gas. Different scales were developed over the years.
19 September 2013, 06:28 PM ET
FDM printers use a thermoplastic filament, which is heated to its melting point and then extruded, layer by layer, to create a three dimensional object.