SOIL Soil Science Education Home Page (submitted soil stories, articles, activities, etc.) http://ltpwww.gsfc.nasa.gov/globe/index.htm Soil Wildnet Africa - Improve the Soil in your Garden Naturally (explains earthworms' effects) http://wildnetafrica.co.za/wildlifestuff/juniorpage/soil/earthworm.html EPA Site:  What on Earth is Soil? http://www.epa.gov/gmpo/edresources/soil.html Ask the Answer Worm about Soil and Stuff http://www.nrcs.usda.gov/feature/education/squirm/skworm.html