This site from Wikipedia the encyclopedia is a concise site that is technical in nature but links are provided for clarification. Includes a comparison between meiosis and mitosis.

This site from the Wikipedia encyclopedia contains a qualitative explanation of activation energy, explaining what it is and why it is necessary. Links are also provided throughout the article for additional information.

An encyclopedia article from Wikipedia which discusses what the Pauli exclusion principle is, its applications in science, and why its significance.

This site from Wikipedia encyclopedia provides an overview of the series of manned space missions that occurred during the 1960s and early 1970s. The article describes the objectives of each of the manned eleven flights, and discusses...

This encyclopedia article from Wikipedia provides a general overview of squid. Content includes a focus on their physical characteristics, diet, and habitat.

This narrative from the Wikipedia encyclopedia presents the major developments in the history of computing. It discusses the earliest devices used to perform calculations, the era of modern computing that began during World War II,...

Wikipedia encyclopedia entry for the chemical compound amine. Includes naming conventions, properties, reactions, and the like.

This Wikipedia encyclopedia article provides a brief overview of what carbonic acid is.

This website from the Wikipedia encyclopedia contains a brief biography on author Edna St. Vincent Millay and links to the e-text to four of her works. Other links are provided throughout for additional information.

Although Wikipedia is a "free" encyclopedia, it usually has good entries. This entry includes a description and information on temperament, health, and history.

This site from the Wikipedia encyclopedia gives a definition and information on hardness, value determination, and natural versus artificial rubies. Links are provided throughout for additional information on related subjects.

This Wikipedia encyclopedia article shows how gravel is mined and used in building and paving.

Wikipedia provides this encyclopedia entry for cement that features its history, production, and use as a building material, as well as links to related topics.

Wikipedia provides an encyclopedia entry about concrete that features pictures, diagrams, history and other information, as well as links to related topics.

Wikipedia provides this encyclopedia article about collagen and its purpose in the human body.

A Wikipedia encyclopedia entry that provides a solid overview of who the Hmong are, where they live, and their history (including important moments in major Chinese dynasties and the Vietnam War). Include links to additional culture and...

Short encyclopedia article from Wikipedia about the logical fallacy named false dilemma (also known as false dichotomy, either/or dilemma, or bifurcation). This is a rather brief discussion of the term, but a few examples are given.

Short encyclopedia article from Wikipedia that defines and gives historical context to free verse poetry. Although no examples are given, there are links to related topics available.

Wikipedia, an open-source encyclopedia, offers great information on the classification system used in Biology. Covers the benefits of the system, history, and general information on the whole system together.

Here at Wikipedia you can find an encyclopedia article exploring the life of Nelle Harper Lee and her work.

Wikipedia, a free and open-source encyclopedia, provides a lengthy overview of the cheetah. Here you can explore a cheetah's reproduction behavior and social life, diet, and habitat, as well as the cheetah's economic importance and...

Wikipedia, a free and open-source encyclopedia, offers a detailed overview of the lion. Content includes a focus on lions in the wild, attacks on humans, cross-breeding with tigers, and more.

Wikipedia, a free and open-source encyclopedia, explores the life of jaguars. Content focuses on habitat, hunting behavior, and habitat.

Wikipedia provides a brief overview of the classicist form of drama is provided in this encyclopedia article. The Three Unities of time, place, and action are also discussed along with a listing of classicist playwrights.