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This collection of dubious medical devices reminds us that sometimes, medicine is best left to the doctors.

While technically this museum closed in 2002, thanks to the intrepid efforts of the Science Museum of Minnesota and curator and collector Bob McCoy, the collection lives on as the "Questionable Medical Device" collection in the Science Museum of Minnesota. Exhibits on display include a phrenological machine that gauges personality by measuring the size of bumps on the head and glasses and soap products designed for weight-loss. You can still have your phrenology read by the fully functional machine today, and as the machine outlines the bumps on your skull, the phrenology reader "maps" intelligence, morality, and much more. Machines such as these were all the rage at State Fairs of the early 1900s, as were other questionable medical devices. The infomercials of their time, these snake oils and pseudoscience gadgets could cure impotence, tell how smart you were, and make you live forever.