Astronauts stay in space for a year, and their genes mutate by 7%. Will they evolve?

It won't evolve, but a media report is wrong. In fact, the astronaut's gene expression pattern changed by 7%, instead of 7% gene mutation. It was their expression that caused the misunderstanding.

Prior to this, after four Russian astronauts lived in space for several months, their bodies changed obviously. After so many years of experiments, scientists finally found some signs. If astronauts stay in space for a long time, the cerebrospinal fluid in the brain will change. Because the brain will judge the influence of space environment on human body as a threat, human brain fluid will also change accordingly.

The so-called cerebrospinal fluid refers to the transparent liquid wrapped around the brain and spinal cord, which can protect the brain. After a period of recovery, the gray matter in astronauts' brains increased to a normal level, but the white matter did not increase at all, which also shows that this change is irreversible to some extent. The reason why mankind painstakingly built the space station is because one of its goals is to survive in the outer space environment in the future. However, life in outer space is not as simple as people think. The weightless environment in outer space not only receives all kinds of training, but also affects the normal function of human body.

Although it has not affected the body so far, it is not clear whether it will affect the body in the future, which has also cast a shadow on scientists moving to outer space, and some changes are even irreversible. Humans are used to the gravity environment of the earth, and living in outer space for a long time will inevitably have some adverse effects on the human body. With the progress of science and technology, there must be a way to solve the influence of weightlessness in space on human body when astronauts board space in the future.