Fossil Of the cave bear (Ursus spelaeus), a relative of the brown bear and polar bear in the Pleistocene epoch in Europe The subfamily Ursinae seasoned a dramatic proliferation of taxa about five.3–four.five Mya, coincident with important environmental variations; the very first customers in the genus Ursus appeared about this https://www.youtube.com/channel/UCCoZfLHRsYsRsVHqS-CSAWA