11 February 2016, 06:42 PM ET
Microcephaly is a condition in which a child's brain doesn't develop properly. The most obvious symptom is that the child has a smaller head than others of the same age and gender.
04 February 2016, 09:28 PM ET
Fungi make up a whole kingdom of living organisms, from mushrooms to mold to yeast.
03 February 2016, 10:59 PM ET
Tapeworms are flat, segmented parasites that can grow in a host's intestine and feed for 30 years.
02 February 2016, 07:02 PM ET
North American brown snakes are nonvenomous, unlike the Australian variety, which is among the most venomous in the world.
02 February 2016, 06:47 PM ET
Some experts say camel's milk may help fight a number of diseases, including diabetes, cancer, shingles and autism.
27 January 2016, 07:21 PM ET
Faraday’s Law of Induction describes how an electric current produces a magnetic field and, conversely, how a changing magnetic field generates an electric current in a conductor.
26 January 2016, 09:00 PM ET
Listeriosis is a bacterial infection typically caused by eating contaminated food.
26 January 2016, 12:05 AM ET
Gopher snakes are nonvenomous serpents that are often mistaken for rattlesnakes.
25 January 2016, 11:53 PM ET
Omnivores are the most flexible eaters of the animal kingdom; they eat both plants and meat.
22 January 2016, 08:04 PM ET
A carnivore is an animal or plant that eats the flesh of animals.
21 January 2016, 06:35 PM ET
An herbivore is an animal or insect that only eats vegetation, such as grasses, fruits, leaves, vegetables, roots and bulbs.
13 January 2016, 11:10 PM ET
Mutations are alterations to a DNA sequence. They can cause diseases and conditions, but they are also tools in evolution.
13 January 2016, 06:56 PM ET
The Paleo Diet is a modern attempt to replicate the diet of humans of the Paleolithic age. These ancient hunter-gatherers lived before the advent of agriculture and subsisted on lean proteins, eggs, fruits, vegetables, nuts and roots.
12 January 2016, 12:22 AM ET
Milk snakes are colorful, banded, nonvenomous snakes found throughout the Americas.
11 January 2016, 10:49 PM ET
A GMO is an organism that has had its DNA altered or modified in some way through genetic engineering.
08 January 2016, 09:39 PM ET
Anacondas are found in tropical South America. They are among the largest snakes in the world and are known for their swimming ability.
07 January 2016, 11:22 PM ET
Gas is a state of matter that has no fixed shape and no fixed volume. Gas particles spread out and are evenly spaced throughout a container.
07 January 2016, 09:33 PM ET
The Cretaceous Period lasted approximately 79 million years, and ended with a major extinction event about 65.5 million years ago.
05 January 2016, 10:35 PM ET
Viruses are microscopic parasites that lack the capacity to thrive and reproduce outside of a host body.
05 January 2016, 11:24 AM ET
The periodic table arranges all of the known elements in an informative array.
23 December 2015, 03:23 PM ET
Gluten refers to the proteins found in wheat endosperm. Some people are gluten-intolerant, but a gluten-free diet is not for everyone.
17 December 2015, 11:59 PM ET
Fat gets a bad rap, but including it in your diet is important for good health.
17 December 2015, 11:50 PM ET
Electric charge is a fundamental property of matter and the foundation for electricity.
17 December 2015, 10:03 PM ET
The winter solstice brings shifts in temperature and icy weather as the sun dips to its lowest point in the sky.
10 December 2015, 11:30 PM ET
A gluten-free diet is recommended for people who have celiac disease or gluten sensitivity. For other people, however, going gluten-free can be unhealthy.
10 December 2015, 12:45 AM ET
Protein is a macronutrient that is essential to building muscle mass. It is commonly found in animal products, though is also present in other sources, such as nuts and legumes.
19 November 2015, 10:25 PM ET
"Natural" and "organic" are common on food labels, but the terms can be confusing. There are, however, specific definitions for each term.
18 November 2015, 06:50 PM ET
Diets that dramatically limit the grams of fat a person eats may be useful for short-term weight loss, but they may not be healthy in the long-term, experts say.
17 November 2015, 11:46 PM ET
The Mediterranean diet focuses on eating foods that are as natural as possible, while limiting unhealthy fats and red meat. Many studies have shown that this type of diet can be very beneficial.
13 November 2015, 07:21 PM ET
A calorie is a unit of energy. Counting calories is one way to monitor weight loss.
12 November 2015, 11:18 PM ET
Boa constrictors are non-venomous snakes famous for their method of subduing prey. They rank among the longest snakes in the world.
11 November 2015, 09:59 PM ET
A low-carb diet focuses on cutting carbohydrates from a person’s diet. While it can help some lose weight, it can also deprive the body of needed nutrients if taken to extremes.