This site from Wikipedia, the Free Encyclopedia, provides great information on Teflon, created by the DuPont corporation. Links are provided throughout for additional information, along with several formulas, and interesting facts.

The life of songwriter Stephen Foster is chronicled in this encyclopedia article from Wikipedia. The article discusses his numerous works and his attempt to make a career as a professional songwriter.

A basic description of the Mir space station is provided on this site from the Wikipedia Encyclopedia. There is also information on the Mir modules. A photo of the space station is included along with several links to additional...

The achievements of the first woman in space, Valentina Tereshkova, are overviewed in this Wikipedia encyclopedia article.

This encyclopedia article from Wikipedia on racquetball discusses how it is played, gives some playing strategies, and describes some different kinds of shots. Links are also provided for further information.

Information is given on the life, works, and beliefs of Chinese philosopher Lao Zi in this encyclopedia article from Wikipedia. Links are provided throughout for additional information on related subjects.

This encyclopedia article from Wikipedia on adaptive radiation discusses what it is, lists some examples, and distinguishes between the three different types of adaptive radiation.

A Wikipedia encyclopedia article on Blaise Pascal (1623-1662 CE) gives an overview of his contributions to math and physics. It also discusses hisabadonment of the two subjects for religion.

This site from Wikipedia provides an encyclopedia article on carbohydrates provides information on their structure. There is also a section on monsaccharides, disacchardies, and polysaccharides, which gives some information about...

This encyclopedia article from Wikipedia on mitochondrion describes its function, structure, the energy conversion process, and its use in genetic studies. An illustration is also provided.

This site from the Wikipedia encyclopedia provides a biography on Wilhelm Rontgen discusses his discovery of what became known as x-rays. The article also provides some information on his education and achivements throughout his life.

This encyclopedia article from Wikipedia on Maya Angelou discusses her careers in literature, activism, and screen, and lists her many accomplishments in these areas. Links are also provided for additional information.

Wikipedia, a publicly-maintained encyclopedia, provides an explanation of spherical geometry along with a listing of its most important uses.

Wikipedia, a publicly-maintained encyclopedia, provides an article on the dwarf planet, Pluto, including images, physical characteristics, history of its naming, the planet/dwarf planet debate, and more.

This Wikipedia Encyclopedia entry provides a brief explanation of an electroencephalogram test, (EEG). Includes information on the EEG's discovery and use.

Wikipedia, a publicly-maintained encyclopedia, provides this article on strokes, otherwise known as "cerebrovascular accidents." The article defines a stroke, the difference between an ischemic stroke and a hemorrhagic stroke, stroke...

This encyclopedia article from Wikipedia on helper T cells discusses what Helper T cells are and the function of the CD4 protein.

An encyclopedia article from Wikipedia on C. S. Lewis (1898-1963 CE) discusses his literary career, mentioning his scholarly work, novels, and his writings dealing with Christianity. Links are provided throughout for additional information.

A brief encyclopedia article from Wikipedia describing the Fauvism art movement and listing the artists associated with the movement.

Encyclopedia entry about the Greek philosopher Socrates. Includes information about his life, trial and death, philosophy, links to additional information, and more.

Encyclopedia article about Plato that includes information about his life and works. Also includes a long list of references and links to additional information.

Encyclopedia article about the Greek astronomer Hipparchus that contains information about his life and work. Also includes a lengthy list of references and links to additional information near the bottom of the page.

Encyclopedia article about the Greek philosopher Empedocles. Also contains a picture and links to additional information.

Encyclopedia article about Aeschines, also known as "Aeschines Socraticus," the follower of Socrates. Also contains links to related information.