This resource provides in depth information on the conic sections. Click on the underlined words for definitions and diagrams.

Site specifies genetic cause of Marfan Syndrome as well as gene locus. Also includes disease characteristics and information regarding treatment of cardiovascular symptoms.

This site explain ellipse how they are formed with the foci, and gives a nice moving demonstration of drawing an ellipse. Read further down the page to equations of ellipses in different systems, including polar. The last half of the...

Provides a definition and examples of perpendicular bisectors.

Learn about equidistant points with this handy reference guide. Provides a detailed definition and an interactive activity that enhances further explanation. Includes links to related topics.

This site, which is provided for by the Rice University, gives a description of the social aspects of the wasp colonies - division of labour.

This article is a biography of Prince Henry and details the value of his work and insights.