Fossil Of the cave bear (Ursus spelaeus), a relative of your brown bear and polar bear with the Pleistocene epoch in Europe The subfamily Ursinae knowledgeable a spectacular proliferation of taxa about 5.3–4.5 Mya, coincident with significant environmental improvements; the main customers of the genus Ursus appeared all around this https://www.youtube.com/channel/UCCoZfLHRsYsRsVHqS-CSAWA