A mummy of a Chinchorro child, dating to between 5000 B.C. and 3000 B.C. The Chinchorros were hunter-gatherers who lived in the region between modern-day Peru and Chile. Claudio Santana/AFP/Getty Images hide caption itoggle caption Claudio Santana/AFP/Getty Images The Two-Way Climate Change May Be Destroying World's Oldest-Known Mummies March 10, 2015 The Chinchorros, who lived between modern-day Peru and Chile, mummified their dead at least 2,000 years before the Egyptians. But some mummies have begun to turn to ooze, so scientists investigated.