Fossil With the cave bear (Ursus spelaeus), a relative of the brown bear and polar bear in the Pleistocene epoch in Europe The subfamily Ursinae skilled a spectacular proliferation of taxa about 5.three–4.5 Mya, coincident with significant environmental changes; the main members with the genus Ursus appeared about this time. https://www.youtube.com/channel/UCCoZfLHRsYsRsVHqS-CSAWA