Karin and Kathy Kettler, the Canadian throat-singing sisters who together are known as Nukariik, carry on the Inuit throat singing tradition of the elders from their mothers' village in Kangiqsualujjuaq, Quebec, Canada The practice started as a way for women to pass the time while men were out hunting. It's a friendly competition in which two women face each other and layer the same beat a second apart. It's also a way to sooth babies. Most women wore the babies on their backs in large hoods, al