Thomas Young (1773-1829) is best known in the physics community for his double-slit experiment demonstrating the wave property of light and for his work on the tensile properties of solids (Young's modulus). His reputation as a physicist was built almost entirely upon a short, three-year period (1801-1803) of intense work as an instructor in physics and philosophy at the Royal Institution. The culmination of his work at the Royal Institution is described in "A Course in Lectures on Natural Philosophy and Mechanical Arts" (1807), a two-volume set containing a wide diversity of topics, including his double-slit experiments. Physics teachers and their students should be aware that Thomas Young's contributions went far beyond these two accomplishments. Little known is that, despite having a reputation as a physicist, Young never took degrees in natural philosophy (physics). He studied to become a physician by attending prestigious medical schools in London, Edinburgh, and Göttingen. To become certified as a physician, he completed a bachelor's and doctorate degrees at Cambridge University in physic (medicine).