04 February 2015, 09:26 PM ET
Continental drift was a theory that explained how continents shift position on Earth's surface.
04 February 2015, 09:17 PM ET
A miscarriage is the loss of pregnancy before the 20-week mark in the pregnancy. The medical term for a miscarriage is spontaneous abortion.
04 February 2015, 09:09 PM ET
Celiac disease is an autoimmune digestive disease that affects at least 1 in 133 Americans. People with celiac disease cannot eat gluten.
03 February 2015, 09:49 PM ET
Measles is one of the most contagious infectious diseases. Ninety percent of the people who stand near someone with the virus will become infected.
03 February 2015, 08:18 PM ET
Ulcerative colitis, a condition that causes inflammation and sores in the large intestine and rectum, is generally diagnosed in people younger than age 30
03 February 2015, 08:16 PM ET
Daily exercise, calorie control key to achieving healthy weight
03 February 2015, 08:03 PM ET
Four stages of pancreatic cancer
03 February 2015, 07:59 PM ET
Tai chi is a self-defense and calisthenics technique developed in China centuries ago.
30 January 2015, 04:33 PM ET
India is one of the world's oldest and most diverse cultures. Here is an overview of Indian customs and traditions.
29 January 2015, 11:02 PM ET
The spleen is an important organ for keeping bodily fluids balanced. It is possible to live without it, but removal of the spleen has serious consequences.
29 January 2015, 09:34 PM ET
Italian culture, steeped in the arts, architecture, music and food, has flourished for centuries. Here is a brief overview of Italian customs and traditions.
28 January 2015, 07:40 PM ET
The greenhouse effect occurs when Earth's atmosphere traps solar radiation because of the presence of certain gases, which causes temperatures to rise.
28 January 2015, 07:27 PM ET
A midwife is a trained professional who aids and supports women in their pregnancies. Many women with low-risk pregnancies prefer using a midwife.
27 January 2015, 09:40 PM ET
The pancreas helps regulate blood sugar levels. It is also an important aid in digestion.
26 January 2015, 11:50 PM ET
Facts about the element helium, including properties, sources, uses and isotopes.
26 January 2015, 11:38 PM ET
The network of nerves is the body's electrical wiring.
26 January 2015, 10:55 PM ET
Flying reptiles ruled the skies for millions of years.
26 January 2015, 03:09 AM ET
The Romani ethnic group, often called Gypsies, have unique customs, spiritual beliefs and cultural traditions.
23 January 2015, 07:42 PM ET
This turkey-sized dinosaur looked very different from its 'Jurassic Park' depiction.
23 January 2015, 05:43 PM ET
The history, properties, sources, uses and isotopes of the element hydrogen.
23 January 2015, 05:31 PM ET
Avoid cigarettes, aspirin and alcohol to help ulcers heal
23 January 2015, 05:19 PM ET
Germans place a high value on hard work, precision and order, and have made tremendous contributions to engineering, classical music and beer. Here is an overview of German customs, traditions and values.
21 January 2015, 08:04 PM ET
Erectile dysfunction (ED) is the inability to get or keep an erection. It is caused when penile tissues do not fill up with blood.
21 January 2015, 07:56 PM ET
Every labor story is different, but there are definitely signs that can let you know if you are in the early stages of labor.
21 January 2015, 07:38 PM ET
The customs and traditions of France, center of fashion, art and architecture.
20 January 2015, 10:36 PM ET
Properties, sources and uses of the element zinc.
20 January 2015, 10:31 PM ET
Crystal healing is an alternative medicine technique that employs crystals and other stones as conduits for natural healing energy.
20 January 2015, 10:03 PM ET
Chinese culture reflects the customs and traditions of one of the largest countries in the world, with 1.34 billion people.
15 January 2015, 10:50 PM ET
Nearly 6 million U.S. adults suffer from bipolar disorder.
15 January 2015, 10:23 PM ET
Nearly every region of the world has influenced the customs and traditions of the United States.
15 January 2015, 10:19 PM ET
The urinary system – also known as the renal system – produces, stores and eliminates urine, the fluid waste excreted by the kidneys
15 January 2015, 09:29 PM ET
Atrial fibrillation is a heart condition caused by irregularities in the cardiac electrical signal. The condition can result in stroke or heart failure, but treatment is available.