• Desert Biome
• The Desert Environment

Swamps

• What is a Wetland?
• From the Desert to the Sea: Major Habitats of Southern California
• Swamps of New Jersey: The Meadowlands
  

Grasslands

• Biomes of the World: Grasslands

Oceans

• Marine Ecosystems
• Looking at the Sea

Prairie

• Build-a-Prairie

Polar Regions

• Virtual Antarctica: Science
• Virtual Antarctica: Ecology