Q. How long are earth-worms?
A. There are many, many species of earth-worms. Some are so small they can fit between the grains of sand. These worms live in water and are called microdrile earth-worms. They may be only a couple of millimeters in length. They can be found in saltwater, fresh water or estuaries. At the other extreme are the giant earth-worms that live in the rain forests. They can be several feet long.
The Smithsonian Institution houses the National Collection of Worms in Washington, D.C. It's in the National Museum of Natural History. There are 13 million specimens in the collection! If you want to see the whole collection, call for a special appointment.