Have you ever listened to the sound of a cube or tetrahedron? Eric Rankin has, and he found that perfect harmony resonates from perfect geometry. Plato once discovered shapes which he considered to be the most harmonious. But what he did not realize, is that those shapes also hold perfect musical harmony. All around us, the natural world is teeming with sacred geometry and until now, we have been completely unaware of the sacred symphony which resounds from the correlation between all of this geometry and the frequencies of sound. This interview with Sean Stone was originally webcast on January 23, 2017.