Chondrostei is a mostly forgotten group of cartilaginous fish which deserves at least one page, and here it is. Good information on a cartilagnous fish.

This site from the University of California contains detailed information about lampreys. There are several pictures, including special links.

A cladogram that gives the evolutionary relationship between the different groups of mammals. Modern relationship drawing, somewhat difficult to interpret.

Describes what segmented worms are and gives a brief description of thier evolution through the use of their fossil record.

A short look at the spirochetes and the diseases they cause.

This site contains a chart showing the progression of the Paleozoic Era. Each section of the chart leads to information about the geological, biological, and climatic elements of a specific period of the era.

This site from the University of California, Berkeley contains general information and links to information about the fossil record of birds, the life history of birds, the systematics of birds, and the morphology of birds.

University of California Berkeley offers a short, concise description about egg-laying mammals with links to more in-depth information.

A glossary of useful terms, including "abyssal plain" and related terms.

Learn about different forms of life that coexist with us on Earth. This Berkeley article provides links to brief write-ups on the three domains of living organisms: Eukaryota, Bacteria, and Archaea.

One of the most famous fossil organisms, trilobites were once a complex group. Learn to tell them apart in this illustrated article that tells how they lived, their body structure, there place in evolution, and the like.

Museum site note on the history of evolutionary thought and includes scientists and thinkers who have contributed to our understanding of life on Earth. Links are provided for da Vinci, Linneaues, Erasmus Darwin, and others.

Site details with the current topics concerning dinosaurs. Site covers dinosaur speeds, dinosaur extinction, warm-blooded dinosaurs and more.

A concise site that describes the four basic features that all chordates share.

A brief description of the four spheres of the Earth, with an activity where students brainstorm interactions among them.

Brief, but thorough overview of the temperate deciduous forest. Lists of flora and fauna found in the forest.

[Free Registration/Login may be required to access all resource tools.] Describes how fossils help us understand the past.

This survey of early dinosaur discoveries in North America discusses the first dinosaur specimens and the scientific debate that they inspired.

This brief article defines "placental mammals," lists examples of these animals, and describes the characteristics which render their classification.

left to right: J.W. Lytle, Mrs. Margaret B. Vear, and museum paleontologist Chester Stock (1892-1950) were members of a Los Angeles Museum Expedition to Bishop's Cap Cavern, New Mexico

Unidentified man and Marion Schmidt Escallon (1912-2003), Sinclair Oil Company paleontologist, at a U.S. Geological Survey meeting, December 1937. A Phi Beta Kappa graduate of University of Michigan, she was first woman employed as a...

Home of Yale paleontologist Othniel Marsh; now part of the Yale School of Forestry.

Office of paleontologist James Hall, a leader in research on the geology of North America during the 19th century; designed by Vaux and Olmsted.

First stromatolites in North America discovered here; fossils of marine algae were fully described by pioneering female paleontologist Winifred Goldring.