Very recently, the National Toxicology Program reported a correlation between exposure to whole body 900 MHz radiofrequency radiation and cancer in the brains and hearts of Sprague Dawley male rats. This paper proposes the following explanation for these results. The neurons around the rat’s brain and heart form closed electrical circuits and, following Faraday’s Law, 900 MHz radiofrequency radiation induces 900 MHz electrical currents in these neural circuits. In turn, these 900 MHz currents in the neural circuits generate sufficient localized heat in the neural cell axons to shift the equilibrium concentration of carcinogenic radicals to higher levels and thus, to higher incidences of cancer. This model is then applied to mice and humans.