The Singing Colossus of Memnon

The twin Egyptian statues erected by Amenophis III were already ancient relics when Roman travelers visited them in the first century CE. One stood tall and unconquered by some 1400 years of sun and sand, the other lay toppled by a recent earthquake. The Romans mistakenly called them the Colossi of Memnon, and inscribed proof of their visit on the legs of the toppled colossus -- because it spoke to them. In this episode of Stuff to Blow Your Mind, Robert Lamb and Joe McCormick discuss the singing colossus. Why did it start speaking? Why did it stop?