Scientists have uncovered the mummified remains of cheetahs from caves in northern Saudi Arabia. The remains range from 130 years old to over 1,800 years old. Researchers excavated seven mummies along with the bones of 54 other cheetahs from a site near the city of Arar, calling the discovery "serendipitous."   Mummification prevents decay by preserving dead bodies. Egypt's mummies are the most well-known, but the process can also happen naturally in places like glacier ice, desert sands and