Why humans usually get sick and die, while other wild animals usually die from old age? Why do domestic animals get sick? Why are human diseases so complicated, and even cancer is common?
The average life span of the ancients was different in each dynasty. With the passage of time, the progress of society, the development of science and technology, and the improvement of life, human life span has gradually increased along with the historical process, as follows:
1, about 18 years old in Xia and Shang periods.
2, Zhou and Qin periods were about 20 years old.
3, Han dynasty is about 22 years old.
4. About 27 years old in Tang Dynasty.
5, Song Dynasty is about 30 years old,
6, Qing Dynasty is about 33 years old.
7. About 35 years old in the Republic of China. The average life expectancy of
in the present age has reached 77 years.
The average lifespan of ancient humans was very short, generally less than twenty years old. This is the normal lifespan of human beings. Because of the various inventions and creations of mankind, the improvement of diet has improved the life, and the lifespan is getting longer and longer, to the modern age. It has been three or four times the life span of humans in ancient times, and the extra decades of life span are completely prolonged by changes in food and living conditions. During these decades, the body has been supplemented with a lot of nutrients and at the same time. Also "raising" the bacterial virus , to a certain extent, the human body will become ill and cause death. You see that the wild animals still don’t get sick, and they basically die of old age. Let’s look at the artificially raised animals, especially pets. , Will also get sick, because their lifespan will increase under manual intervention, so they will also get sick.
Since humans have been different from wild animals in their diet, life expectancy has been increasing. Diseases have also followed, and treatments have also emerged. Humans have been fighting and fighting with viruses, and they have basically reached a tie. , No victory or defeat, hope that with the development of technology and the progress of the times, mankind can completely eliminate the virus, let mankind live a happier life and enjoy the fun of life!
