Zoology, derived from the ancient Greek "zoon", meaning animal, and "logos" meaning knowledge, refers to the branch of biology which relates to the animal kingdom. This includes the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct.

Biologists acquire scientific knowledge by use of what is known as the scientific method. Following the steps of the scientific method ensures that scientists have an orderly way of gaining information about the biological world.

There's always a lot of talk about calories, especially when speaking in terms of weight loss. How many calories are too many? Does it matter what type of calories we consume? But, do most people really understand exactly what a calorie is and how calories work?

We've all heard how important it is to get the necessary amount of vitamins in our diet, but exactly what vitamins do we need and what are the best foods to eat to help ensure we meet the daily recommendations?

Most people know that vitamins are good for you, but many don't really understand what vitamins are or why they are needed by the body to maintain good health. Exactly what are vitamins and how were they "discovered"?

We talk about viruses all the time - cold viruses, flu viruses - but what do you really know about this biological entity? The study of viruses, or 'virology,' is a sub-specialty of microbiology.

Ichthyology uses many terms that are unique to the science. This is a glossary of terms used in ichthyology, fisheries, fisheries management and fisheries science.

Environmentalism uses many terms that are unique to the science. This is a glossary of environmental terms. (A through E)

"With every drop of water you drink, every breath you take, you're connected to the sea. No matter where on Earth you live." - Sylvia Earle

Stephen Jay Gould (September 10, 1941 - May 20, 2002) was a modern science treasure. His writings allowed countless readers to experience the wonder and joy of evolutionary biology and paleontology.