Polar bears and penguins never bump into each other! Why is this? The answer, of course, is simple; polar bears live only in the Arctic (the North Pole) and many species of penguins are found only in the Antarctic (the South Pole).

Keeping Warm in Water

Harp SealMarine mammals, such as seals and whales, live around both the North and South Poles. The heat from a warm-blooded animal is absorbed by cold water faster than it is by air. A human being would survive for only a few minutes in the freezing polar seas but the bodies of seals and whales are adapted so that they can keep warm. As with the land mammals their shape is rounded but a fur coat would not be much good for trapping heat underwater; instead they have a very thick layer of blubber to keep body heat from escaping.

Read More: Frozen fish?

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