University of California
Ucmp: Introduction to the Annelida
Berkeley offers a great site on segmented worms titled, "Introduction to Annelida, Everybody's favorite, worms."
Georgia Department of Education
Ga Virtual Learning: Geologic Time and Correlation
In this amazing interactive tutorial you will learn about what methods are used by geologists to learn about the history of the Earth. Investigate a geologic time scale and learn about how scientists have developed and organized a record...
American Museum of Natural History
American Museum of Natural History: O Logy: Fighting Dinos: New Discoveries
A virtual investigation surmising how two fighting dinosaurs died in the Gobi Desert.
University of California
Ucmp: Monotremes, Egg Laying Mammals
University of California Berkeley offers a short, concise description about egg-laying mammals with links to more in-depth information.