Fossil In the cave bear (Ursus spelaeus), a relative with the brown bear and polar bear through the Pleistocene epoch in Europe The subfamily Ursinae experienced a spectacular proliferation of taxa about five.three–4.5 Mya, coincident with important environmental modifications; the very first members from the genus Ursus appeared close to https://www.youtube.com/channel/UCCoZfLHRsYsRsVHqS-CSAWA