This article has been updated to clarify the fact that the ancestors of cave bears, not the species of cave bear analyzed for the study, diverged from the ancestors of brown bears and polar bears 1.6 million years ago.
NEW YORK (GenomeWeb News) – Cave bears belonged to a sister group to modern day polar bears and brown (grizzly) bears, according to phylogenetic analyses of the newly sequenced cave bear mitochondrial genome.

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