It was on a warm spring day when I first heard it. I didn’t know what it was, but I knew that it was different. While interviewing men about transformations in Bedouin life and simultaneously sipping sweet tea, an elderly gentleman who was seated in the back corner of the tent suddenly burst into what sounded like a song. Surprised, I asked my hosts what was happening. They explained that their relative, who was over 100 years old and blind, was responding to my questions usi...