A number of extinct varieties are also known, notably the woolly rhinoceros of the [[Ice Age]], which cohabited with the Woolly [[Mammoth]]. Several frozen corpses of this animal have been discovered in the [[Siberia]]n [[permafrost]]. | A number of extinct varieties are also known, notably the woolly rhinoceros of the [[Ice Age]], which cohabited with the Woolly [[Mammoth]]. Several frozen corpses of this animal have been discovered in the [[Siberia]]n [[permafrost]]. |