20 September 2014, 01:05 AM ET
Aerodynamics is the study of how gases interact with moving bodies, especially aircraft and automobiles.
19 September 2014, 10:15 PM ET
The seasonal flu shot is a yearly vaccine administered to protect against the flu, or influenza. In the United States, flu shots are recommended for everyone ages 6 months and older.
19 September 2014, 08:19 PM ET
What's behind the percussive symphony? And is it okay to crack your knuckles?
18 September 2014, 06:59 PM ET
Spinal stenosis is a narrowing of the spinal canal. As the canal narrows, it puts pressure on the spinal cord or nerve roots, causing pain, numbness or other problems.
18 September 2014, 02:03 PM ET
Flamingos are large birds with long necks, sticklike legs and pink or reddish feathers. The colors of the feathers come from pigments found in their food.
17 September 2014, 09:54 PM ET
A variety of healthy foods and beverages helps a mother-to-be provide the important nutrients a baby needs for growth and development.
17 September 2014, 07:39 PM ET
Rheumatoid arthritis is a chronic disease in which the immune system attacks the joints.
17 September 2014, 04:22 PM ET
Ostriches are large, flightless birds that live in the dry, hot savannas and woodlands of Africa.
16 September 2014, 07:35 PM ET
Restless legs syndrome (RLS) is a disorder characterized by an intense urge to move the legs. The impulse can be so strong that an individual is unable to resist.
16 September 2014, 05:53 PM ET
On the Big Island of Hawaii, one of the world's most active volcanoes has been spewing lava since 1983.
16 September 2014, 11:41 AM ET
Properties, sources and uses of the element silicon.
15 September 2014, 09:04 PM ET
Chronic fatigue syndrome is a puzzling medical condition characterized by extreme fatigue, impaired memory, joint and muscle pain, tender lymph nodes, and sore throat.
15 September 2014, 12:59 PM ET
Stonehenge, a huge prehistoric monument, was built 5,000 years ago in England. Its builders and its purpose remain a mystery.
12 September 2014, 06:39 PM ET
Lupus is a chronic disorder in which the immune system attacks otherwise healthy cells. It is characterized by fatigue, joint pain and rashes.
12 September 2014, 06:28 PM ET
Working out while pregnant is safe, and has benefits for both the mother and baby.
12 September 2014, 01:20 AM ET
Structural engineering deals with the framework of structures, making sure they can withstand the stresses of their environment and remain safe, stable and secure.
12 September 2014, 12:48 AM ET
Classical mechanics is the mathematical study of the motion of everyday objects and the forces that affect them.
11 September 2014, 07:41 PM ET
Also called ‘gouty arthritis,’ gout is a painful form of arthritis caused by too much uric acid in the blood. Learn about causes, symptoms and treatment.
09 September 2014, 05:44 PM ET
Carpal tunnel syndrome is a nerve-related condition that causes pain and numbness in the wrists and hands.
09 September 2014, 01:41 AM ET
Nuclear engineering deals with harnessing the energy released from nuclear reactions. Nuclear engineers work in power production, weapons manufacturing, food production, medical technology and other fields.
05 September 2014, 06:36 PM ET
Forecasts have improved, but challenges remain.
05 September 2014, 05:47 PM ET
Type 2 diabetes is the most common form of diabetes, a condition characterized by high blood sugar levels.
04 September 2014, 08:16 PM ET
Aerospace engineering deals with designing and building machines that fly. There are two main specialties: aeronautical engineering and astronautical engineering.
04 September 2014, 03:43 PM ET
Tooth sensitivity is a common dental problem that involves discomfort or pain in teeth when encountering certain substances and temperatures.
04 September 2014, 02:01 PM ET
Properties, sources and uses of the element palladium.
03 September 2014, 05:48 PM ET
Lyme disease is a bacterial infection caused by the bite of a tick. Early symptoms include a bull's-eye rash.
03 September 2014, 05:36 PM ET
Panic disorder is marked by sudden and repeated bouts of extreme fear that can last for several minutes or even longer. These episodes are referred to as panic attacks.
02 September 2014, 02:44 AM ET
Until recently, no one had ever seen the moving rocks at Racetrack Playa, but a new video shows the stones creeping across the desert.
29 August 2014, 07:18 PM ET
Dry, inflamed, itchy skin is a sign of the skin disorder eczema.
29 August 2014, 06:18 PM ET
Nail fungus, also medically known as onychomycosis, is a chronic fungal infection of the fingernails and/or toenails.
29 August 2014, 06:02 PM ET
Learn about keeping your kids’ teeth healthy and strong from infancy on and setting them up for a lifetime of healthy teeth and good dental hygiene practices.
28 August 2014, 11:59 PM ET
Civil engineering is the design and construction of public works, such as dams, bridges and other large infrastructure projects.