7과 본문 Animals in Cold Places
Animals in Cold Places
When it gets cold outside, people put on jackets and gloves.
Some people drink hot chocolate.
Others stay inside under blankets.
But how about animals?
How do they survive the cold?
Let’s find out some of their survival secrets.
Polar bears
First, meet polar bears.
Did you know that polar bears have clear fur?
Their fur only looks white to us because of the sunlight.
So, why is clear fur helpful in the cold?
It lets more sunlight reach their skin.
Here comes another interesting fact about polar bears.
They have black skin!
Dark skin helps them take in more heat.
Having clear fur and black skin keeps polar bears warm.
Arctic foxes
Arctic foxes have dark skin and fur, too.
They also use their big tails to keep themselves warm.
When they sleep, they wrap their tails around their bodies like blankets!
However, they may lose body heat through their ears in the cold air.
Unlike other foxes in warm places, arctic foxes have small ears.
Their ears are so small that they can help the foxes lose less heat.
Whales
Now, what about animals without fur?
How do whales live in icy water?
The winter sea is so cold that you cannot swim there, even for a second.
However, whales have a special way to stay warm in icy water.
They have thick fat under their skin.
The fat can be more than 40 cm thick.
It covers their bodies and keeps them warm.
The fat also gives whales energy when they cannot find food for a long time.
Wood frogs
Lastly, in Alaska, w winters can be too cold for wood frogs.
What do they do to survive the freezing weather?
These frogs freeze themselves!
Up to 60 percent of their bodies freeze.
They stop breathing, and their heart stops beating.
But don’t worry.
When spring comes, they come back to life.
Nature is so amazing.
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