Wikimedia
Wikipedia: Phlogiston Theory
Wikipedia offers detailed information on the Phlogiston Theory, a discredited 17th century theory hypothesis regarding combustion.
Wikimedia
Wikipedia: Photoelectric Effect
Wikipedia provides excellent information on the photoelectric effect, including it's history, explanations, common uses, and more.
Wikimedia
Wikipedia: Plastic
Wikipedia offers all of the basic information one would need about the topic of plastic. Includes hyperlinked table of contents for easy site navigation.
Wikimedia
Wikipedia: Polka
Wikipedia offers detailed information on polka, a type of music and dance originating in Bohemia. Includes samples, artists, and more.
Wikimedia
Wikipedia: Polyphony
Wikipedia provides a brief description and history of the term, polyphony, including many hyperlinked terms.
Wikimedia
Wikipedia: Pop Art
Wikipedia offers information on this art genre and the artists of the pop art artistic movement. Includes hyperlinks to the different artists.
Wikimedia
Wikipedia: Portuguese Man O'war
Wikipedia offers detailed information on the Portuguese Man O'War, a type of jellyfish. Also includes a chart of scientific classification.
Wikimedia
Wikipedia: Potsdam
Wikipedia provides information on the history and sights of Potsdam, a city in eastern Germany, now the capital of the state of Brandenburg.
Wikimedia
Wikipedia: Joseph Pulitzer
Wikipedia provides biographical information on Joseph Pulitzer (1847-1911), an American newspaper publisher. The Pulitzer Prize was set up by his will.
Wikimedia
Wikipedia: Radio Telescope
Wikipedia provides detailed information on radio telescopes, including an image, hyperlinked terms, and related topics.
Wikimedia
Wikipedia: Red Alga
Wikipedia offers detailed information on red alga, including an image and a scientific classification chart.
Wikimedia
Wikipedia: Rocket
Wikipedia provides an encyclopedia definition of a rocket, including information on rocket history, size, types, and more.
Wikimedia
Wikipedia: Rubber
Wikipedia provides detailed information on rubber, a hydrocarbon polymer. Includes information on the composition and uses of rubber.
Wikimedia
Wikipedia: Russian Literature
Wikipedia offers information on Russian literature, old and new. Includes many hyperlinked terms.
Wikimedia
Wikipedia: Saccharin
Wikipedia provides detailed information on the artificial sweetener, saccharin. Includes chart, external links, and hyperlinked terms.
Wikimedia
Wikipedia: Franz Schubert
Wikipedia offers biographical information on Franz Peter Schubert, nineteenth century Austrian composer.
Wikimedia
Wikipedia: Sexual Selection
Wikipedia offers a site on the topic of sexual selection, including an image and a description of one of the most famous types of sexual selection.
Wikimedia
Wikipedia: John Maynard Keynes
An in-depth encyclopedia article from Wikipedia on economist John Maynard Keynes details his life and professional works, and gives information about his skills as an investor.
Wikimedia
Wikipedia: Sikh
Wikipedia offers detailed information on Sikhism, including history, gurus, religious philosophy, persecution, and more.
Wikimedia
Wikipedia: Slime Mold
Wikipedia provides several paragraphs of information on slime molds, members of the Protista kingdom. Includes image.
Wikimedia
Wikipedia: Spectral Line
Wikipedia offers information on spectral line, a dark or bright line in an otherwise uniform and continuous spectrum.
Wikimedia
Wikipedia: Strontium
Wikipedia offers detailed information on the chemical element, Strontium, including notable characteristics, applications, history, occurrence, isotopes, precautions, and more.
Wikimedia
Wikipedia: Disaccharide
Wikipedia provides a brief description of disaccharides, including hyperlinked terms and examples.
Wikimedia
Wikipedia: Sun Yat Sen
Wikipedia offers excellent biographical information on the Chinese revolutionary leader, Sun Yat-sen.