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Wikipedia: Wheel
An encyclopedia article from Wikipedia on the wheel discusses how wheels operate and travel on surfaces, and gives information on the invention and use of the wheel in ancient times. Links are also provided for additional information.
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Wikipedia: Opal
This encyclopedia article from Wikipedia provides a general overview of the mineral opal.
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Wikipedia: Trigonometric Function
This page from Wikipedia, a free and open-source encyclopedia, covers how to solve a variety of trigonometric equations, most of which involve substitution with a trigonometric identity. The identities themselves are not covered, but...
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Wikipedia: Continental Drift
A brief Wikipedia encyclopedia article on continental drift. It tells what continental drift is, what causes it, and gives examples of evidence that continental drift has occurred.
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Wikipedia: Tycho Brahe
A great overview of the life of astronomer Tycho Brahe from Wikipedia Encyclopedia. This article discusses his contributions to the world of astronomy, and his building of his observatory called Uraniborg.
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Wikipedia: Aluminum
This encyclopedia article from Wikipedia details the properties of aluminum, including its history, applications, characteristics, its isotopes, and some precautions about aluminum.
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Wikipedia: Diary
An encyclopedia article from Wikipedia on the diary discusses the transition from the first diaries being used strictly for business to diaries being used for personal use. Also gives details on diary (or journal) writing during the 21st...
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Wikipedia: Lewis and Clark Expedition
An encyclopedia article from Wikipedia on Meriwether Lewis and William Clark's 1804-1806 expedition. The article discusses the places that were visited during their journey, the significance of the expedition, encounters they had with...
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Wikipedia: Joseph Lister, 1st Baron Lister
Did you know that Listerine mouthwash was named after Joseph Lister? This Wikipedia encyclopedia reference gives an overview of the work and accomplishments of prominent physician, Joseph Lister (1827-1912 CE). Lister is credited with...
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Wikipedia: Aardvark
This encyclopedia article from Wikipedia provides a brief overview of the aardvark. Additional content includes a focus on "aardvark" as a subject of humor in British comedy.
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Wikipedia: Hyperbolic Geometry
This encyclopedia entry from Wikipedia offers a discussion on hyperbolic geometry. The site explains how the hyperbolic geometry plane is represented in two dimensions and how lines in the plane must be drawn. Other types of models for...
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Wikipedia: German Shepherd Dog
This article from Wikipedia, an open-source encyclopedia, offers a general overview of german shepherds. Content includes a look at this dog's appearance, temperament, health, and history.
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Wikipedia: Sulfur
This site from the Wikipedia Encyclopedia provides information on atomic properties, physical properties and notable characteristics of sulfur can be found on this informative site. Links are provided for additional information.
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Wikipedia: Anton Van Leeuwenhoek
This site from the Wikipedia encyclopedia provides a concise explanation of van Leeuwenhoek's (1632-1723 CE) contribution to the improvement of the microscope and his contributions to cell biology.
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Wikipedia: Urbanization
This site from the Wikipedia encyclopedia provides a great overview of the term urbanization. It is clearly written and has links to definitions that are unfamiliar to readers. A great starting place to learn about urbanization.
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Wikipedia: Haitian Creole
A Wikipedia encyclopedia entry on the Haitian Creole language. Includes information about the African and European origins of the language and sample words and phrases. Additional links to a passable online dictionary, Radio France...
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Wikipedia: Urdu Language
A Wikipedia encyclopedia entry with detailed information on Urdu, the language of more than a 100 million people living in Pakistan, India and other parts of the world. Includes a clear explanation of the relationship between Hindi and...
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Wikipedia: Tagalog Language
A Wikipedia encyclopedia entry on Tagalog / Filipino, the official language of the Phillipines. Provides information on known history and influences and Tagalog's selection as the national language. Gives examples of words incorporated...
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Wikipedia: Billy Sunday
Wikipedia encyclopedia article on Billy Sunday, noted for his fire and brimstone evangelism.
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Wikipedia: Mammal
Wikipedia, an open-source encyclopedia, provides great information on mammals. Content includes a look at mammal characteristics, origins, classification, and more.
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Wikipedia: Chivalry
This article, from the Wikipedia Encyclopedia, explores what chivalry is, how it originated, and its basic virtues.
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Wikipedia: Aesthetics (Or Esthetics)
A Wikipedia Encyclopedia article that defines aesthetics and discusses it in a number of contexts, including literature. A broad definition of the term is provided at the top of the page, and then links are provided to discussions of the...
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Wikipedia: Satellite Radio
Wikipedia offers an encyclopedia article focused on satellite radio. Content includes a focus on satellite radio in the United States and Britain.
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Wikipedia: Mustelidae
This Wikipedia encyclopedia article explores mustelids, a family of carnivorous mammals. Content includes a look at the range of species in this family, including a look at their common characteristics.