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Diagrams
Polar Bear and Grizzly Bear skulls

Illustration of a polar bear skull (Ursus maritimus), viewed from the side.
Side view of a polar bear skull.

Illustration of a grizzly bear skull (Ursus arctos), viewed from the side.
Side view of a grizzly bear skull.

Illustration of a polar bear skull (Ursus maritimus), viewed from below.
A polar bear skull, viewed from below.

Illustration of a grizzly bear skull (Ursus arctos), viewed from below.
A grizzly bear skull, viewed from below.