Investigators have determined that a skull discovered in the wall of an ... sell it to physicians looking to learn more about human anatomy.

The skull of a teen from the 1800s was found more than 45 years ago during a home renovation project in suburban Chicago – thanks to the advancement of DNA technology, we finally know her name.

However, some joint conditions may need surgery or, in the case of arthritis, a joint replacement. Johns Hopkins Medicine. Anatomy of the hand. The American Society for Surgery of the Hand. Joints.