Global warming is impacting arctic marine mammals severely, especially walruses. The arctic ice is retreating and making life harder for walruses. United States scientists found around 121 dead walruses off the coast of Alaska. The walruses that were found dead had been trampled on from other walruses, from being on a small piece of ice which scientists say is very unusual. Scientists say that there have been stampedes before, from hunters, but these stampedes they are seeing now are not the same.
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