In the 1800s, prisoners were forced to walk on treadmills as a form of punishment.It came out of wartime efforts to create a substitute for rubber.An inventor adapted a pump to create a soothing hydrotherapy bath for a family member with arthritis.College students started the craze by tossing empty pie tins from a local bakery.Before it became a cosmetic treatment, it was used to treat eye muscle problems.An early version of it was developed by doctors for use in surgery, not for cutting trees.It was created to protect missile parts from rust and corrosion.These tissues were first sold as a way to remove cold cream and makeup.It started out as a surgical antiseptic and was even marketed as a floor cleaner before becoming a mouthwash.Its inventors originally tried to sell it as textured wallpaper.