Strangely enough, body farms are just what they sound like. They are places where bodies are left for different periods of time - partially buried, buried or exposed to the elements.
Bodies at these secure, outdoor facilities, are used to teach forensics students how to determine factors such as whether a body has been moved, when the person died, and even whether a body has been frozen. Students observe the effects of a body's decomposition, as well as insect activity on bodies. Body farms also can be used to help train cadaver search dogs.
There are two body farms in the United States. One is at the University of Tennessee in Knoxville and the other Western Carolina University in Cullowhee, N.C. A third is planned to open at Texas State University-San Marcos.