If the genes in the astronaut s body change, will the length of life change?

When astronauts return from space, the genes of their bodies do change, and the length of their lifespan will also change, but the length of their lifespan is inconclusive. <>

American scientists once did a study of a twin, one of the twins has been in space, in the astronaut's 40-year study of the astronaut, they did find that after the astronaut returned from the universe, the body's genes have mutated, the length of chromosome telomeres has become longer, and chromosome changes mean that the length of a person's life will be affected. But the study did not point out how chromosomal changes played a role in longevity, or brevity, or how they were produced.

At the beginning of the study, scientists did find that the astronauts had their genes destroyed after returning from space, but six months after returning to Earth, the gene sequence returned to normal. This phenomenon has been experienced by almost every astronaut who has been on the space, and many astronauts will return to the body from the universe after long-term training, such as nasal bleeding, brain deformation, and eye compression, such pain is unbearable for us ordinary people, and only people who have undergone long-term training can do it. <>

And physical pain is not the main thing, there will be an invisible force in the universe to change the genes of the human body, but when you return to the earth, these changes will gradually disappear, but there are still some small changes, which will still remain in the human body, causing damage to the human immune system.

In fact, the universe will change to all living things, for example, after China's astronauts land in space, the capsule will bring a large number of plant seeds, these seeds follow the astronauts to drift into space, and take root and sprout after returning to the earth.

No, the length of life has nothing to do with genes. Genetic changes can only affect the physical characteristics of astronauts, not lifespan.

Astronauts are affected by space rays, so there are some changes in genes, and the length of their lifespan will also change.

Yes. The astronaut's body is exposed to space radiation, and the genes will mutate, which is very harmful to the body.

The environment of space is very different from that of Earth. Astronauts in space will undergo some kind of changes in their bodies because of the different environments. So what exactly are these changes?

Hello. Astronauts experience genetic mutations after space travel. NASA research has shown that there are a number of mutations in the astronauts' genomes, but most of them are recoverable and will fade away when the astronauts return to Earth.

In addition, the study found that the space parade had an effect on the astronauts' epigenetics, that is, the astronauts' gene expression was altered, but this change did not affect the astronauts' genomes. As a result, the space parade produces genetic variations in astronauts, but such variations tend to be temporary, and they do not have long-term effects on astronauts' health.

For many years, humans have lived on Earth, growing and evolving on the Azure Planet, just like many animals and plants. As human beings move into space, it also leads us to think: like the mutated plants that grow in space, if humans also stay in space for a long time, will our bodies change?

NASA previously released the results of the "Twin Space Experiment", which caused many rumors that astronauts stayed in outer space for 340 days and had mutations in their genes, but in fact this is just a misunderstanding.

The fact that astronauts and brothers are not genetically identical. A study led by NASA has shown that prolonged space travel can cause genetic changes in astronauts and pose a variety of health risks. The results of the study were recently published in the American journal Science.

NASA came to such conclusions after studying American astronaut Scott Kelly and his twin brother. Previously, Scott Kelly worked on the International Space Station for 1 year, and his brother Mark Kelly lived on Earth. Researchers conduct comparative studies on them.

The results showed that six months after the end of the mission, most of Scott's gene expression returned to normal levels, but there were still 7% changes in gene expression.

Myth: A genetic change is not a genetic mutation. Similar news has been made before, but surprisingly, a 7% genetic mutation in space for a year makes the news even more eye-catching.

Due to the bias in understanding, many people mistakenly believe that the genetic change of astronauts is a genetic mutation, but these are two different things- The genetic differences between humans and orangutans are about 7% between humans and monkeys. In other words, if the astronaut's genetic mutation really reaches 7%, then this change is equivalent to a human becoming a monkey.

What changes occur in an astronaut's body?

A year of space travel has caused astronaut Scott's body to produce a number of changes, including thickening of the carotid arteries, thickening of the retina, changes in the intestinal flora, and changes in the structure of chromosome endings. According to statistics, more than 1,000 genes have been altered, but no genetic mutations have been caused. However, human evolution does not happen by going to the space station once.

Astronauts will continue to mutate their genes even if they don't stay in space, and human evolution is the change in the gene frequency of the human population.

Humans are genetically mutated even if they don't stay in space. Leave behind genes that are more adapted to the environment.

Genes do not mutate, and astronauts simply die from lack of oxygen or water and food.

Probably, but current science and technology are not enough to keep astronauts in space for a long time.

No, it's just a change in the influence of human beings in the universe.

I don't think it's evolutionary yet, it's just a mutation.

This shouldn't be a genetic mutation, it doesn't feel very realistic.

Such mutations are not necessarily suitable for the current generation of mutations on Earth, and they are not evolutionary.

It shouldn't matter, but it's also possible, and the future is anyone's guess.

Friends who know something about aerospace should know that human technology has been able to send people into space, although it is impossible to stay in space permanently, but it is still possible to stay in space for a long time

I think so, and now people want to explore space more and more, and there are a lot of uncertainties in space itself, so if you want to successfully migrate to space, you have to endure this genetic change.

Possibly, because I think humans are more capable of adapting to the environment.

Sort of, because astronauts also have genetic mutations in order to adapt to space, which can be regarded as a kind of evolution.

I don't think it's related, the astronaut's genetic mutation is because he has lived in space for a long time, and his body has changed because of environmental factors.

There is a connection that astronauts themselves are living beings, and after receiving cosmic rays, genetic mutations occur that cause changes in the gene pool, and humans evolve as a result.

I think there's still a connection. The ** of life may be a genetic mutation, and astronauts may have received some rays in the universe when they go to space, so there is a genetic mutation.

Many astronauts undergo "irreversible" changes in their bodies. Does life really come from the universe?

So far, about 550 astronauts have carried out short missions in space and even on the moon due to various missions. However, only 8 astronauts have been working in space for more than 10 months. The parameters are known, but the impact of long-term space work is still unknown!

I think it's probably because of the specific environment of outer space.

This is just a guess, because the universe has not been fully explored, and there are many uncontrollable factors.

Some ** reports that "changes in this gene have not yet been discovered" have aroused people's imagination. Many people wonder if a trip to space will actually lead to a permanent mutation in the genes. What is the actual situation? Let's talk about that.

The two twin brothers evaluated are astronauts, both with space experience. Previously, Scott Kelly lived in space for 180 days and Mark Kelly lived in space for 54 days. Before this experiment, they had not been in space for 4 years.

The study sent Scott Kelly into space for 340 days, while Mark Kelly lived on Earth as a reference. In this study, genome-wide RNA expression (RNA-seq) and sequence methylation levels (WGBS) of the twins were compared. However, the entire genome sequence has not yet been determined.

Therefore, the "genetic changes" are unknown.

Why gene expression changes. Changes in gene expression are human responses to the environment, and occur when humans are faced with challenging situations such as rock climbing and diving。After Scott Kelly returned to Earth, he gradually adapted to the gravitational life of Earth, and most of his physiology returned to the state he was in before he participated in space travel.

After Scott landed, some gene expression returned to normal, while after six months on land, the rest did not. These genes are implicated in the immune system, DNA damage, bone formation networks, hypoxic diseases, hypercalcemia.

How much DNA has changed in life in space. Long-term space life may cause a response to DNA damage, resulting in changes in the DNA sequence, but this study did not determine the complete genome sequence, so it is unknown how much the DNA sequence has changed. NASA's research found that in addition to the effects of intense ionizing radiation on space station astronauts, DNA replication, transcription, and protein synthesis will also be affected.

This is because astronauts may be affected by some rays in space.

Genetic mutations are genetic mutations caused by exposure to cosmic rays. Astronauts wear spacesuits that can block almost all cosmic rays, so theoretically not. However, not all genetic variations are good.

Aerospace activities are a special kind of professional activities, which have the characteristics of special working environment, highly complex vocational skills, and arduous flight tasks. Such a profession requires astronauts not only to have a healthy physique and good mental quality, but also to have a high degree of tolerance and stress resistance to the space environment, and at the same time should have profound knowledge and superb skills. Therefore, all space departments in the world have carefully selected astronauts.

The specific content of astronaut selection is determined according to the equipment of the spacecraft and the space mission, and is generally divided into four aspects.

1. Basic conditions.

It is the same as the pilot selection, but the level of education and work ability are more demanding.

2. Medical selection.

In addition to the medical selection conditions for pilots, attention was paid to the presence of recessive neuro-endocrine system dysfunction in the past. During the physical examination, the cardiovascular system, vestibular function, and visual system must be thoroughly and carefully examined.

3. Psychological selection.

The selection of mental quality is an important aspect of the selection of astronauts, and it is necessary to find out the personality, emotional stability, mental state, adaptability and coordination of working with others.

4. Endurance selection for aerospace special environment.

In the early days of manned spaceflight, people attached great importance to the selection of endurance in special environments, but with the continuous development of aerospace technology and the gradual improvement of the environment in manned spacecraft, some special environmental factor tests, such as noise, vibration and temperature, were no longer the main content of selection. The special environment endurance selection is mainly carried out to test the ability to adapt to weightlessness and re-adaptation after returning, such as vestibular function test, overweight endurance test, low-pressure hypoxia endurance test, etc.

NASA recently announced that former American astronaut Scott Kelly and his twin brother Mark Kelly had a 7% genetic difference, and the DNA of the twins did not match, which means that Scott Kelly made his genes permanently mutated (or mutated) in the space station for a year.

NASA recorded and studied any information about Scott's body before, during, and after his return to Earth on his "one-year mission" to the ISS, and compared it with his twin brother's physical information to see if anything had changed. After about two years of research, NASA showed that they were 7% different in their genes.

Although scientists published results about Scott's genetic changes last year, it was not clear at the time how much had changed. This time, scientists not only discovered detailed genetic changes, but also largely identified the main cause of the phenomenon.

Researchers have shown that the human body is under "hypoxic pressure" for a long time during space flight, and the body will naturally think that it is not in the oxygen environment, so it will always be stressed, and it will increase the occurrence of many inflammations in the body, and various nutrients in the body will also change. In addition to the genetic changes, previous studies have also found that Scott's chromosomal terminals have grown a lot in space, immune function is very active, and collagen, blood clotting cells, and so on in the body have changed. However, these changes usually return to normal within a period of time after returning to Earth, unlike genes, which remain in a state of change for a long time.

Although scientists had discovered that Scott's genes had changed when he first returned to Earth, researchers at the time believed that it was only due to the natural mental stress of humans in space, thinking that it would return to normal after a while (like his chromosome terminals, which returned to normal length after two days). Who knew that the current findings proved that this genetic change would be permanent.