The scientific name Deinoterium is a group of prehistoric mammals that lived from the Miocene to the Pleistocene, belonging to the order Longnose. Famous for its unique downward curved long teeth, which are different from the long teeth of modern elephants. They grow from the lower jaw and curve upwards, rather than from the upper jaw. Large in size, similar to modern elephants, but may have different behavioral and living habits. Fossils of terror elephants have been found in Africa, Asia, and Europe, indicating their widespread distribution. The reason for the extinction of this prehistoric behemoth is not fully understood, but it may be related to climate change and human activities.

The cave bear (scientific name: Ursus spelaeus) is a prehistoric bear that lived in Europe and Asia, living in the Pleistocene period about 300000 to 15000 years ago. They are much larger than modern bears, with male cave bears weighing up to 1,000 kilograms. The skull of the cave bear is an important and interesting specimen for paleontologists and researchers studying prehistoric mammals. The characteristics of the cave bear's skull include its enormous size and strong structure, reflecting the bear's enormous size.