Journey through the story of human evolution in a multimedia documentary experience.

Online activities for learning biology, including animated cartoons, an evolution simulation laboratory.

Online activities, labs and tutorials. Site available in Spanish.

The complete nature and wildlife resource featuring the Audubon Guides to plants and animals, outdoor planner.

Information on North American animals and plants with illustrations, text, activities, and access to a naturalist.

Facts, in-depth articles, ask-a-scientist forum, archive of answers and newsletter on oceans and ocean life.

Interactive GCSE Biology website. Some of the topics that it covers are cells, photosynthesis, the nervous system and homeostasis.

Enter the world of Science Bob to try home experiments, visit his on-line lab and get answers to your science questions.

Describes microbiology, the rain forest and the possibility of extraterrestrial life.

A Natural Science reference site for middle school students.