Unearthed in 1999 from the 22,000-foot summit of Mount Llullaillaco, a volcano 300 miles west of here near the Chilean border, their frozen bodies were among the best preserved mummies ever found, with internal organs intact, blood still present in the heart and lungs, and skin and facial features mostly unscathed. No special effort had been made to preserve them. The cold and the dry, thin air did all the work. They froze to death as they slept, and 500 years later still looked like sleeping children, not mummies
