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Animalia >
Echinodermata
- Palaeos Echinodermata - Provides the various classifications of this group of marine animals including the recent number of their genera. With sketches.
- Biology of Echinoderms - Presents a video detailing the distinguishing characteristics of the different classes of this phylum. Includes photos.
- Phylum: Echinodermata - Characterizes this group of marine animals including the various classes such as starfishes, sea urchins, and feather stars.
- Nearctica Echinoderms - Lists titles of books about marine invertebrates.
Includes authors and short descriptions.
- Some Weird Echinoderms of the Cincinnatian - Describes unique members of the phylum that are found in this particular area. Includes sketches.
- Wonders of the Sea: Echinoderms - Details the distinguishing characteristics and traits of the various classes of these marine animals. Includes sketches.
- Shape of Life: Phylum Echinodermata - Presents a brief overview of this group of marine animals together with classifications and common names. Includes images.
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Plantae >
Bryophyta
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Hepaticophyta
- Photographs of Liverworts - Presents a gallery of representatives of the phylum from the collection of the University of Glasgow. With links to related sites.
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Math >
Geometry
- Area and Volume Formulas - Includes basic formulas for common geometrical figures.
- Bob's Pages - An interactive presentation of different geometric figures, including polyhedra, fractals, the arbelos, logarithmic spiral and Soddy's Hexlet.
- The Complete Quadrilateral - An interactive column by Alex Bohomolny, discussing theorems and presenting illustrative demonstrations through java-enabled applets.
- Cubical Box Distances - Uses java-enabled applets to determine distances. Also provides problems and calculations on surface distances on a cuboid.
- Diamond Theory - Description of new geometric theory, which reveals that Euclidean symmetry may be invariant under rather interesting groups of noncontinuous (and asymmetric) transformations.
- Encyclopedia of Triangle Centers - A compendium of more than 1,000 triangle centers. Also includes links related to triangle centers.
- Erich's Packing Center - Illustrated solutions to several covering, packing, and tiling problems. Includes some animated demonstrations.
- Geometry Activities - Filled with problem-solving modules for simplified geometry.
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