polar bears have small ears because
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The polar bear's small ears and tail offer less surface area than large ears or tails, and help maintain body warmth. Fat. Polar bears have a layer of fat that can be four inches (10 cm) thick. Although their fur is the primary source of insulation, the fat helps keep heat in as well.
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Small ears reduces heat loss.
It would appear that the species of bears that have the smallest ears are in the coldest climates and are more prone to fighting each other. Smaller ears are much less sensitive to cold and provide a smaller target in a fight. Although their ears are small, their hearing is still acute.
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It would appear that the species of bears that have the smallest ears are in the coldest climates and are more prone to fighting each other. Smaller ears are much less sensitive to cold and provide a smaller target in a fight. Although their ears are small, their hearing is still acute.
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