Will mankind never leave the earth? What kind of impact will it have?

Space exploration represents the future of mankind and the pursuit of itself. There are countless mysteries in the vast universe, which attract human beings to explore all the time.

In order to uncover its mystery, countries all over the world have also made great efforts to constantly update the most advanced spacecraft and train space astronauts. And is the vast space an ideal paradise? What a pity! The real environment in space is not friendly, and it attacks the astronauts' bodies all the time.

In the complex space environment, not only the radiation left by the Big Bang, but also the high-energy particles radiated by various celestial bodies form cosmic rays. Astronauts wear thick spacesuits when they leave the cabin and do their best to protect themselves from the damage caused by space.

However, new research has found that when astronauts perform tasks in space, their brains will become larger due to microgravity, which will lead to significant changes in the structure of astronauts' brains. These changes may help explain why astronauts will have some unusual physical symptoms after returning to Earth.

This new study relies on magnetic resonance tomography (MRT) to scan the brains of astronauts returning to Earth. The results show that the brain structure of most astronauts has changed, the brain has moved up in the skull and the headspace of cerebrospinal fluid has become smaller.

So what is cerebrospinal fluid? Cerebrospinal fluid (CSF) is a clear liquid, and its main function is to buffer the collision between brain and skull wall. Secondly, it can improve the circulation of brain tissue. Space can also lead to muscle atrophy and bone density reduction, but so far, the impact on human brain tissue is still a mystery.

The researchers found that long-term exposure to microgravity can cause brain and cerebrospinal fluid to expand. When astronauts stay in space, the volume of gray matter in the brain will decrease and the volume of cerebrospinal fluid will increase, thus making the brain bigger.

Rachel, the head of the study? Rachael Seidler said that the decrease in the amount of gray matter in the brain may be due to the changes in the distribution of cerebrospinal fluid in the brain after astronauts entered space.

All these indicate that long-term space life may lead to the gradual replacement of white matter volume by cerebrospinal fluid, which is the reason why astronauts' vision declines after returning to Earth, and this damage will last for a long time. In addition to vision problems, astronauts will also have optic nerve dilation, retinal hemorrhage, eye structure changes and other problems.

How long will this brain change last? The research results of foreign scientists show that the change of cerebrospinal fluid circulation pattern of astronauts lasts for 7 months after returning to Earth. After 7 months, the volume of gray matter gradually began to rebound, but it is not clear whether the great changes of gray matter and white matter in the brain will affect the changes of cognitive ability.

In addition, the cerebrospinal fluid in the brain will also increase significantly. Although the volume of the brain cavity will return to normal after the astronauts return to Earth, the volume of the outer cavity will gradually increase.

Now you look up at space. Does the infinite universe scare you? Do you still yearn for interstellar migration? The seemingly calm space is full of danger. If human beings want to really go into space, they still need to face many difficulties.