Treehut
Suzy's World: Life on Earth
This site from Suzy's World, which is a personal site from Suzy Cato, explores what evolution is, and how long there has been life on earth. Content includes fun facts, a great experiment, and a classroom activity.
PBS
Pbs Teachers: Life's Big Questions: How Did the Universe Begin?
Investigate the Big Bang Theory of the origin of the universe by researching the light spectrum and the actions of light waves. Create models that illustrate red shift in a moving star and the expansion of the universe.
American Geosciences Institute
American Geosciences Institute: What Can We Tell From the Fossil Record?
Find out what the fossil record tells scientists about the geologic and biological history of the Earth.