This collection of images of six different creatures, including insects and carnivorous vertebrates, illustrates the wide range of mouth types that exist within the animal kingdom. It also discusses the environment and its impact on the...

Examine the behavior of seismic waves. This graph illustrates direct and critically refracted waves.

How do birds know what direction to fly when they fly south for the winter? This tutorial explains circadian rhythm using an experiment performed with pigeons.

Four animations showing the movements of surface waves and body waves that are created by earthquakes. Includes P, S, Rayleigh, and Love waves.

This lesson will introduce immigration and emmigration, and explain the effects both can have on a community.

This site provides a general overview of the Aye-aye, complete with several photographs and recorded vocalizations.