This program provides a substantive overview of the theoretical dispute between Albert Einstein and Niels Bohr, a controversy that still resonates today. Bohr’s Copenhagen Interpretation—that measurement of phenomena creates a set of possible outcomes and that unobserved phenomena are meaningless—is thoroughly explained in conjunction with Einstein’s cause-and-effect approach. Using clever animation, archival footage, and interviews with leading physicists, the video illustrates Bohr’s double-slit experiment, the EPR paradox, and modern demonstrations of entanglement, composing an effective summary of quantum principles and the problematic friendship of two towering intellects. (59 minutes)