What color is the polar bear's hair?

Polar bear's hair is a colorless and transparent hollow tube, usually white in appearance, but it may turn pale yellow, brown or gray due to oxidation in summer.

Scientists believe that the polar bear's hair is a small light pipe through which only ultraviolet rays can pass, and it is a "tool" for bears to capture temperature. The reason for this phenomenon is that this kind of hollow wool is waterproof and heat-insulating, which really plays a great role for polar bears living in the cold polar regions of ice and snow, and is very conducive to their survival.

The polar bear is the largest carnivore in North America, weighing 65,438+0,800 pounds and standing as high as 65,438+00 feet. 20 to 90 people are attacked by polar bears every year.

Extended data:

Generally speaking, polar bears are very active in March and May every year. They will wander around the ice floes for food and live an amphibious life. In the severe winter, the outdoor activities of polar bears are greatly reduced, and they can hardly eat for a long time. At this time, they look for shelter and sleep on the ground. The respiratory rate decreases and enters local hibernation.

Polar bears are such excellent swimmers that they were once considered as marine animals. Polar bears spend most of their lives (about 66.6%) in a "static" state, such as sleeping, lying down, or waiting for prey. The remaining 29. 1% of the time is walking or swimming on land or ice, 1.2% of the time is attacking its own prey, and the last time is basically enjoying food.

References:

Polar Bear-Baidu Encyclopedia