Fossil On the cave bear (Ursus spelaeus), a relative of your brown bear and polar bear in the Pleistocene epoch in Europe The subfamily Ursinae professional a dramatic proliferation of taxa about 5.three–four.5 Mya, coincident with significant environmental changes; the initial users of the genus Ursus appeared all over this https://www.youtube.com/channel/UCCoZfLHRsYsRsVHqS-CSAWA