Query: Pleistocene bears
Relevant documents:
Polar bear
Arctodus
Brown bear
Steppe brown bear
Tremarctos floridanus
Spectacled bear
Agriotherium
Ursus deningeri
Ursus etruscus
Ursus rossicus
Ursus dolinensis
Ursus maritimus tyrannus
Arctotherium
Ursus ingressus
Plionarctos