What does it mean that human body temperature is getting cooler?

The normal temperature of the human body has dropped by an average of 37 degrees Celsius, measured in 1851. As for what exactly is behind it, the scientific community does not yet have a precise reason.

Thermometer. In 1851, the German scientist Carl Wendrich first proposed that 37 degrees Celsius (Fahrenheit) be the normal temperature of a human after counting the body temperature of 25,000 humans, and this conclusion was widely accepted at the time.

Scientists came to find that normal body temperature in humans actually fluctuates between 35 degrees and degrees, and the average body temperature of humans should be degrees.

A study by Stanford University in the United States on January 17, 2020 found that the body temperature of modern people has decreased on average every 10 years since the 19th century; Men, in particular, are lower than they were 150 years ago.

Stanford University.

Since the 19th century, the average body temperature of Americans has been declining, and in less than 200 years, their body temperature has quietly dropped, from 37 at the beginning.

Human body temperature should be maintained within a range that allows the body's cells and metabolic reactions to function more efficiently, while also avoiding the breeding of germs inside and outside the body. Therefore, whether the body temperature is too high or too low, it will cause the normal operation of the human body to be abnormal. The significant reduction in body temperature has intrigued scientists, but at the same time puzzled them.

No precise conclusions have been drawn about the significant reduction in human body temperature. One of the main assumptions now is that sanitation has improved, clean water is more widespread, medicines are better and faster, the risk of infection in humans is reduced, and thus their body temperature is lowered. Some people believe that the invention of air conditioning and heating has made it easier for us to maintain a constant internal temperature.

The Evolution of Humanity.

As for the specific cause, scientists have not yet reached a conclusion, and it should be due to a combination of multiple factors. One thing is certain: humanity is constantly evolving, and this is inextricably linked to human evolution.

Although there is no significant difference between human beings today and 5,000 years ago, they may have undergone drastic changes in places that are invisible to the human eye.

The constantly cooling body temperature is related to the continuous cooling environment, and now into the winter, the temperature is also reduced, many friends have worn cotton jackets to maintain the temperature of the body, when the temperature is higher or lower than the normal body temperature, the body will send an uncomfortable signal, and people will respond accordingly.

The higher the person's body temperature, the more active the immune cells in the body are, and the less susceptible it is to bacterial germs. This probably means that human physical fitness is deteriorating.

It means that this person should not be far from death. Humans are homeotherms, but the body temperature of a dead person is cold. That's because the human body is no longer capable of maintaining a constant temperature, that is, it is dying.

Coupled with the fact that more and more people are now installing air conditioners in their homes, air conditioners have indeed facilitated people's lives to some extent, but long-term use has caused people to have many health problems, such as the occurrence of air conditioning diseases. In the past, when there was no air conditioning, in different environments, people's thermoregulatory centers would constantly regulate the body's body temperature, so that people could adapt to different temperatures. But now, thanks to air conditioning, the human thermoregulatory center has become less sensitive, so that it is less easy to react, causing people's body temperature to drop.

Before the 19th century, most of the groups lived in a very harsh environment, so they often suffered from some infectious diseases or inflammation, and after the inflammation appeared, the body's immune system played a certain role in defense, and the temperature of the human body would increase. Nowadays, the living environment is getting better and better, and some diseases such as chronic diseases, viral infections, inflammation and other diseases have also decreased, so our body temperature will drop. The decrease in human body temperature is not the result of the influence of a certain factor, but is caused by the combined effect of multiple factors such as the surrounding environment and human living habits.

It may be that the environment in which humans live is constantly changing; Human beings should have been in a state of evolution, and many scientific studies have shown that human beings are in a state of improvement in terms of appearance, intelligence and physical fitness.

The continuous decline in human body temperature is mainly due to the lack of corresponding nutrients, which is also related to the speed of metabolism in our body; It's not that humans are evolving.

What is normal body temperature in humans? I believe that everyone will instinctively blurt out this question: 36 degrees! But few people have considered why the normal body temperature of humans is maintained at such a temperature.

In fact, before the middle of the 18th century, people did not have much concept of "normal body temperature", and they judged whether there was a difference in a person's body temperature based on the sense of touch, and of course this habit has continued to this day. Until the 19th century, Karl Ondrich conducted an experiment to measure the temperature of the armpits of 10,000 healthy adults hundreds of thousands of times, and based on the data obtained from the experiment, he proposed for the first time that 37 degrees is the average body temperature of humans. Since then, this temperature standard has been used as a scale and has become common knowledge in most people's minds.

But in reality, this common sense is not as solid as it seems, and in the century since, this temperature standard has been constantly questioned. Scientists analyzed 677423 body temperature data from 1860 to 2017 and found that the standard body temperature of humans is declining every 10 years. This means that the standard body temperature of modern people is no longer 37 degrees, but should be degrees.

Did the ancients keep "having a low-grade fever"?

Or there should be another question, that is, why should the human body temperature be constant at around 36 degrees? And not only humans, but most animals in nature have the ability to maintain temperature. There are two mainstream explanations for this:

In a constant temperature environment, the brain will function better and be smarter.

The ancestors of all animals on Earth have undergone a transition from aquatic to terrestrial, and constant temperature is the result of adapting to environmental changes.

Both explanations start from the purpose of animals (including humans) to maintain a constant body temperature, which is actually an instinct of living beings. Animals maintain a higher body temperature than the environment, which helps to enhance the ability of the animal to solubilize sugar, which is more conducive to promoting the activity of enzymes.

For animals, having these advantages means being more athletic and being able to capture prey more easily. Although humans are also animals, there is still some difference between the constant temperature of humans and the essence of those beasts. Studies have found that 36 degrees is actually the "highest limit" for humans to maintain enzyme activity in the body.

If the temperature is a few degrees higher than this, the enzymes in the human body will lose their activity. On the other hand, if the temperature drops by a few degrees but does not have much effect on the enzymes in the body, it can even make them more efficient.

In short, the body temperature of modern people is indeed declining, and the ancients have indeed been "having a low-grade fever". The most likely explanation is that from a microbiological point of view, modern humans differ greatly from ancient people. This is caused by vaccines and antibiotics, so our immune system is not as active as it used to be, and it doesn't need a higher body temperature to block out those bacteria.

Scientists also said that human body temperature does not decrease all the time, and there is a limit value for it, but the specific value is not known now!

This is because with the effects of global warming, which causes temperature changes around the world, so scientists will have such thoughts.

Because scientists have found in their studies that the temperature of human beings has been decreasing, and people nowadays rarely have high fevers and have been having low temperatures.

According to relevant statistics, it can be seen that the body temperature of human beings is slowly getting lower, which is why there is such a statement.

37 Body temperature is not a thing of the past, and the normal body temperature of the human body today is still 37 degrees.

Probably yes. Because human beings are still in the process of evolution, and the control of body temperature is also part of evolution, it is very likely that body temperature will decrease in the future.

It should be. Because the earth's environment is always changing, human beings are still evolving, and may become lower.

The body temperature of 37 degrees has not become a thing of the past, and the human body temperature is still fluctuating.