This is the only part of the body that is not cold or freezing no matter how cold the weather is

In our bodies there exists a 'superman'. No matter how low the temperature is, the part is never frozen or frozen, while our bodies and limbs are trembling.

1. This is the only part of the body that never "goosebumps".
2. If you know, the parts of your body that are pinched will not hurt?
3. In the future, these excess body parts may completely disappear due to evolution

That special part is the eyes .

And the main reason why the eyes never feel cold is because they only have the nerve to touch and feel, not the cold feeling nerves.

This is a trait that helps people adapt to the environment in the long-term evolution of humanity since ancient times.

Eyes are an important part, helping us to observe the world around anytime, anywhere. If every winter to the eyes are cold, freezing, people will face many difficulties in life.

According to experts, there are quite a number of reasons why the eyes cannot freeze before the cold.

First, the liquid that moistens the eyes is salt water, not pure water, so it has a lower freezing temperature. In addition, the body has a very strong system for regulating body temperature, which regulates body temperature so that the eyes can still see things.

Secondly, there are a lot of capillaries in the eyes, so in the area with low heat, blood flow increases rapidly, reaching capillaries to help heat the eyes, not letting the eyes become cold.

And yet, eye eyeballs are located deep inside, protected by eyelids.

With such a careful protection, the eyes are strong enough to withstand the cold to open their eyes to see the world.