Uyan and Dina were named for the Uyandina River where they were found in the summer of 2015. Discovered in Edoma permafrost deposits, research indicates they are at least 25,000 to 55,000 years old.
The cave lions, Panthera spelaea (Goldfuss), lived during the Middle and Late Pleistocene period on the Eurasian continent between 370,000 and 10,000 years ago.
CT scans have revealed that the cubs hadn’t formed any teeth yet. Their bodies were so well preserved that their fur, ears, soft tissue, and whiskers were intact. Uyan is the better preserved of the pair.
The cubs were between one and two weeks old when they were killed, perhaps in a ceiling collapse in their den.