Why are polar bears not afraid of the cold in winter?

The reasons for not being afraid of the cold are shown below:

Polar bears can live in the Arctic mainly because they have a special "clothing". Polar bears are covered in thick white hairs that look like hollow tubes under a microscope. Not only does it retain heat, but it also converts 95% of the sun's rays into heat.

Do you know why polar bears aren't afraid of the cold? It's a deceptively simple question. If you don't know, let's take a look at the related ones!

White Fur: Polar bear fur is the "solar heat converter". The polar bear is dressed in white**, which is its protective suit for living in the ice and snow.

Scientists' research has proved that its protective suit is a "solar converter", which can absorb the weakest projected light, and gradually accumulate it, collect it on the epidermis, and convert it into heat energy, and the blood under the skin will transport the heat energy to the whole body. It has been determined that a quarter of the caloric requirements of polar bears are provided by white**.

These ** are good heat blockers, so that the polar bear loses less heat, so the polar bear is not afraid of the cold. 2.Thick fats:

Solar energy can be used to the maximum. There is a thick layer of fat under the skin; Gray hair** is black on the body surface to maximize the use of sunlight. **White, below**black, will not be soaked in cold seawater; The fur is long and covered with a layer of grease at the feet, which is both non-slip and cold-insulating; Eat a lot of high-calorie foods in winter, especially the fat of the prey; Polar bears are very picky and eat the fat that eats mainly their prey.

When the polar bear enters the middle of the night, which is the coldest time of the Arctic, it begins to hibernate. Trivia: Scientists studied the thick ** of polar bears and found that the hair of polar bears is not white, but colorless and transparent.

This hair seems to be a quartz fiber, but it is actually a hollow tube, and each hair can emit the sunlight that shines down, giving it a white appearance, which is a good protective color for polar bears. How do polar bears fight the cold? Polar bears are the largest of the living bear species.

Lives in the Arctic and is good at swimming. It mainly feeds on seals, seabirds and fish in the winter and season, and staples plants in the summer. Polar bears are able to thrive in the cold Arctic region, mainly because it has a thick layer of fat under the skin, and the palms are hypertrophied and hairy, which is both warm and non-slip, which is conducive to predatory.

There are ducts in the hair, which absorb ultraviolet rays from sunlight and increase and preserve body temperature. Polar bears usually haunt snow caves on ice floes and are generally active on the ice. Mating in early spring every year, giving birth in November, and living for about 30 years.

They live in cold regions all year round and rarely survive the winter. Why do polar bears want ice. They rely mainly on catching seals.

If there is ice in the Arctic, the seal that swims to the deepest part can only surface to breathe in the ice hole that the polar bear has smashed into so that the bear has a chance to catch it. If there is no ice in the Arctic and seals can breathe freely, although polar bears are also strong swimmers, it is basically impossible to catch seals in the water.

Polar bears are not afraid of the cold for several reasons:1. It is a polar bear that has a thick layer of fat under the skin, which can resist cold.

2. The white fur on the body surface of the polar bear is a hollow structure, which can absorb solar energy for heating.

3. The body hair of polar bears is very long and covered with a layer of oil, and the sea water will not be easily soaked, so it can maintain a good body temperature.

4. Polar bears will eat a lot of high-calorie food before entering the winter, which can produce fat to resist the cold.

01 Mainly because the polar bear has a white fur, which is the protective suit that it lives in the ice and snow. Scientists have proven that this protective suit is the "solar heat converter", which can absorb the faintest projected light, gradually accumulate, and then collect it on the epidermis, convert it into heat energy, and the blood under the skin transports the heat energy to the whole body.

The Arctic, the coldest part of the earth, is one of the few animals that can survive there, and polar bears are one of them. So why are polar bears not afraid of the cold and able to live in the Arctic?

The polar bear has a white coat of fur, which is the protective suit that lives in the ice and snow. Scientists have proven that this protective suit is the "solar heat converter", which can absorb the faintest projected light, gradually accumulate, and then collect it on the epidermis, convert it into heat energy, and the blood under the skin transports the heat energy to the whole body.

It has been determined that a quarter of the polar bear's heat requirements are provided by this white fur. These furs are also good heat insulation, so that the heat of the polar bear's body is rarely lost, so the polar bear is not afraid of the cold.

Some other reasons are that it has a thick layer of fat under the skin; The ** under the white hair on the body surface is black in color, which can maximize the use of solar energy; The body hair is long and covered with a layer of oil, which does not get soaked in icy sea water; There are thick hairs on the soles of the feet, which are non-slip and cold-insulating; Eating a lot of high-calorie foods, especially in winter, polar bears are very picky about eating the fat of their main prey; When the Arctic enters the polar night, which is when the Arctic is at its coldest, it begins to hibernate.