Nature Invasion of the killer whales /
As the ice shrinks in the Arctic, polar bears are struggling to survive in a fast melting world. Although classified a marine mammal, the polar bear is not adapted to hunting in the water. And it is certainly no match for the world's greatest aquatic hunter - the killer whale. In the last few y...
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| Other Authors: | , |
| Format: | Unknown |
| Language: | English |
| Published: |
Arlington, VA :
Public Broadcasting Service (PBS),
2014
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| Series: | PBS Video Collection, Second Edition
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| Subjects: |