ROUNDWORMS

"Roundworms--also known as nematodes--are all around us: some of them are in our bodies where they may be causing disease. Others however, are very important ecologically. They live in the soils where they circulate nutrients, and enrich the soils with oxygen. Roundworms are terribly diverse. Nobody knows for sure how many species of roundworms there are on the face of the earth. One species was recently discovered-- it's only known for beer mug coasters in Central European bars."