Researchers in northern Saudi Arabia discovered seven naturally mummified cheetahs and the skeletal remains of 54 more, preserved by the caves’ dry, stable conditions. Some of the remains are up to 4,000 years old, offering an extraordinary glimpse into a long-lost population. Even more remarkable, ancient DNA revealed that Arabia was once home to more than one cheetah lineage. That discovery could help guide future efforts to reintroduce cheetahs to the region using the most closely related liv

How Dinosaur Fossils Are Formed

Antarctica’s first dinosaur fossil found in a drawer | BBC News