Symmetry, Grey Gardens

Kurt Andersen talks with Christine Ebersole and Scott Frankel, the star and composer of the Tony-nominated music “Grey Gardens.” Astronomer Mario Livio, who explains how the properties of symmetry are linked to human creativity — and how symmetry informs the works of M.C. Escher, J.S. Bach, and Steve Reich. Plus, a beauty expert considers whether symmetry makes us sexy.