Why are southerners generally more frost-resistant than northerners?

China has a vast territory and a large terrain gap, spanning tropical monsoon climate, subtropical monsoon climate, temperate monsoon climate and plateau mountain climate in latitude.

The south of the Huaihe River in Qinling Mountains is south, and the north is north. The temperature in the north is generally low. In winter, snow covers several feet at any time, which makes it difficult for people to travel. Even if the sun is high in the sky, its daily average temperature is very low.

However, in the south, on the contrary, the average temperature in winter in the south is above zero degrees Celsius. If you want to see snow in winter, you can't see it at any time. Like me, I have only seen two or three times of heavy snow in more than 20 years. It stands to reason that northerners are more resistant to cold than southerners living in this low temperature, but the opposite is true.

Here is an example. In college, there was a northerner in the dormitory. Every winter, he wears a thick down jacket and warm clothes, as well as three or four clothes and three or four pairs of thick pants. It can be seen that southerners wear different thicknesses in the same weather and are more resistant to freezing.

It's cold, wet and cold in the south in winter, and it will be very cold only on rainy days and cloudy days. Once the sun rises, the temperature will gradually rise. The north is dry and cold, and there is little water in the air. Even if it is sunny, it will still feel very cold. This is just like the equipment in the game. The cold in the north is like a pure physical attack or magic damage, and a single damage can only be borne by one side. This is not the case in the south. The south is more of a double injury and can't bear it at all. Shake heating has become a standard in southern winter.

Southerners are frost-resistant because they have exercised since childhood, lived in this wet and cold weather since childhood, and developed a more frost-resistant body than northerners; On the other hand, there are genetic differences between the north and the south. People living in the south have lived here for generations, just like creatures in biological systems. In order to survive more appropriately, there are differences in their own skin and so on. The ancestors of southerners have lived here for so many years, and they are relatively frost-resistant. Each generation continues to pass on, becoming more and more frost-resistant. On the other hand, there is always heating supply in the north, and the south relies on quilts and clothes to keep warm. There used to be a heatable adobe sleeping platform. Now there is central heating by the government, and there is air conditioning heating in places where no one is there.

In the south, since ancient times, the only way to keep warm is to bake a stove at home, and once you leave the room, it becomes very cold.

From these aspects, we can see that southerners are more frost-resistant than northerners, which is gradually formed in the long historical process. At the same time, it is also restricted by local climatic conditions. Natural selection, survival of the fittest, survival of the fittest, transforming the environment in the long-term process and gradually adapting to the local climate. The environment, climate and living conditions in the south also make the south more frost-resistant!