Arch of Heaven tells the remarkable story of the rainbow. Venerated as a god and goddess, feared as a demon, and a test for optical theories, the rainbow is woven into our culture, mythology and science, bridging the divide between science and art. The rainbow has always fascinated mankind; it is the subtlest phenomenon that nature presents us, yet it has not had a biographer until now. From the myths of the Incas and Ancient Egyptians, through the...