Fossil from the cave bear (Ursus spelaeus), a relative with the brown bear and polar bear with the Pleistocene epoch in Europe The subfamily Ursinae skilled a spectacular proliferation of taxa about five.3–4.five Mya, coincident with key environmental variations; the main associates with the genus Ursus appeared around this time. https://www.youtube.com/channel/UCCoZfLHRsYsRsVHqS-CSAWA