Scientists have uncovered a rare discovery in northern Saudi Arabia — the naturally mummified remains of cheetahs preserved inside desert caves for up to 2,000 years.

Researchers excavating caves near the city of Arar found seven mummified cheetahs along with skeletal remains of at least 54 others. Radiocarbon dating revealed that while some remains are about 130 years old, others date back more than 1,800 years, with some bones estimated to be nearly 4,000 years old.