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The Arctic is the area around the North Pole. Although you can walk to the North Pole, you are really just walking on ice. There is no land beneath you, which is unlike the South Pole that has a continent called Antarctica underneath all that ice and snow.
A wider variety of animals live in the Arctic region than on Antarctica, because three different continents extend into the Arctic region. These continents are North America, Europe and Asia.
 | The snowshoe rabbit.
What is that extra-thick layer of fat called?
Blubber.
Animals that originally lived in the warmer parts of these three continents slowly drifted north in search of food. Over the years they developed very heavy fur or extra layers of fat to keep them warm.
Another common trait of many of the animals of the Arctic is the color white. Rabbits and baby seals are white so that predators cannot see them hiding in the snow. Polar bears and foxes are white so that the rabbits and baby seals can't see them coming toward them in the snow.
The arctic fox is white, not red.
Snow can be very difficult to walk on, because it crushes down when you step on it. Man invented snowshoes, which are very wide shoes that look like tennis rackets. This distributes the weight over a large area, and allows a person to walk easily on top of the snow.
 | The wolf has much more fur to keep warm.
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