11 May 2015, 09:15 PM ET
Superfoods are foods thought to be good for one's health. The term has no set scientific meaning, however, and any list of superfoods is subjective.
08 May 2015, 01:58 AM ET
Calculus is a branch of mathematics that explores variables and how they change by looking at them in infinitely small pieces.
07 May 2015, 08:33 PM ET
Thermodynamics is the branch of physics that deals with the relationships between heat and other forms of energy.
07 May 2015, 04:57 PM ET
Augmentin is a broad-spectrum antibiotic that works against many common infections, including strep throat, ear infections and pneumonia.
07 May 2015, 04:52 PM ET
Facts and information about the March 11, 2011, earthquake and tsunami that struck Japan.
06 May 2015, 09:43 PM ET
A subduction zone is a collision between two of Earth's tectonic plates, where one plate sinks into the mantle underneath the other plate.
06 May 2015, 01:52 AM ET
Drug allergies are caused when the immune system responds to some chemical portion of a medicine, and symptoms can range from mild to deadly.
05 May 2015, 10:51 PM ET
Diarrhea is one of the most commonly reported ailments in the United States. It can be caused by parasites, viruses or bacteria.
05 May 2015, 01:17 AM ET
Nepal is a narrow, landlocked country directly north of India and below China. Located where two tectonic plates meet, it the area is prone to earthquakes.
02 May 2015, 03:16 AM ET
Horses are ungulates — mammals with hooves. There are more than 400 different breeds.
02 May 2015, 03:05 AM ET
The physical discomforts of pregnancy as well as the emotional stress of this major life change can cause sleep problems and keep a mother-to-be awake at night.
01 May 2015, 01:21 AM ET
Frogs are amphibians known for their jumping abilities, croaking sounds, bulging eyes and slimy skin. They live all over the world and are among the most diverse animals in the world.
30 April 2015, 10:57 PM ET
Water fluoridation is the addition of the chemical fluoride to public water supplies, for the purpose of reducing cavities. The process has caused controversy for more than 60 years.
30 April 2015, 10:44 PM ET
This may be the most important system in the body. Without the ability to reproduce, a species dies.
30 April 2015, 01:27 AM ET
Mitochondria are specialized cellular structures that power various functions.
30 April 2015, 01:21 AM ET
Visible light is the portion of the electromagnetic spectrum that we can see. We perceive the energy as colors.
28 April 2015, 11:11 PM ET
Guinea pigs are a domesticated species of rodent that are popular as pets — and food. These animals no longer exist in the wild.
28 April 2015, 10:23 PM ET
Batteries power everything from your smartphone to your car, but do you know how they work?
28 April 2015, 07:33 PM ET
Archaeopteryx was an evolutionary link between dinosaurs and birds.
28 April 2015, 01:03 AM ET
Crunchy, crispy celery is well known for being low in calories, but its health benefits go far beyond use as a diet food.
27 April 2015, 12:42 AM ET
Risperdal (generic name risperidone) is an antipsychotic drug prescribed to treat schizophrenia, bipolar disorder and some behavioral problems in children with autism.
24 April 2015, 07:59 PM ET
Pigs are mammals with stocky bodies, flat snouts, small eyes and large ears. They are highly intelligent, social animals, and are found all over the world.
22 April 2015, 10:10 PM ET
Listeriosis is a bacterial infection typically caused by eating contaminated food.
22 April 2015, 07:03 PM ET
The human digestive system converts food into nutrients that the body needs.
22 April 2015, 06:56 PM ET
Lactose intolerance is not the same as milk allergy
22 April 2015, 09:37 AM ET
If there's a beast swimming in the Scottish lake, it has proved quite elusive.
21 April 2015, 05:03 PM ET
Earth Day is an annual event, observed on April 22, that celebrates the planet's environment and raises public awareness about pollution.
20 April 2015, 11:52 PM ET
Abdominal pain, bloating and gas all symptoms of IBS
20 April 2015, 11:02 PM ET
Earthquakes occur every day, but most people don't notice the small ones. Here's what causes earthquakes.
13 April 2015, 07:38 PM ET
Dogs are part of a large taxonomic family called Canidae, which also includes wolves, coyotes, foxes and jackals. Members are called canids. Domestic dogs are a subspecies called Canis lupus familiaris.
11 April 2015, 12:50 AM ET
Brown rice is a highly nutritious grain. It is good for the heart, aids digestion and may reduce the risk of cancer, diabetes and high cholesterol.
10 April 2015, 09:42 PM ET
Acid reflux disease, also called gastroesophageal reflux disease (GERD), is a chronic condition that occurs when stomach contents wash up into the throat.