Fossil Of the cave bear (Ursus spelaeus), a relative with the brown bear and polar bear in the Pleistocene epoch in Europe The subfamily Ursinae professional a dramatic proliferation of taxa about 5.3–4.five Mya, coincident with significant environmental improvements; the initial members in the genus Ursus appeared all around this https://www.youtube.com/channel/UCCoZfLHRsYsRsVHqS-CSAWA