Gray wolves were a frequent sight on the American plains, however, they are now an endangered species despite attempts to reintroduce them to their former habitats in the continental United States. Learn about their natural history in...

This informative and interactive site examines how we can get power from garbage. Topics include: waste to energy plants, only ash remains, a bright idea, and more.

A webpage giving an overview of ecology. Learn about the biotic and abiotic factors that make up an ecosystem as well as the different levels of ecology.

Take this ten question quiz on abiotic and biotic environments. The quiz is multiple choice.

At this site from Songs for Teaching, you can learn of the double life of the amphibian. Learn how it changes, what dangers they face and how we can help them survive those dangers.

Designed by the Open University and the BBC, this website from Open2.net explores ecosystems. Included is a lengthy discussion on closed ecosystems and their importance to research, as well as a virtual ecosystem, an interactive showcase...