The human body is not designed for space travel, so the professor of animal ecology at the University of Groningen in the Netherlands. Consequently, space exploration and colonization of other planets, most likely, the person will be available.
In 2007, Stephen Hawking, the famous physicist, tested the feeling of weightlessness, using a special plane. Scientists claim that humanity will soon come to the limits of self-destruction and our planet will no longer fit for existence, which means that space colonization is inevitable for the survival of human civilization. To avoid extinction, according to scientists, development of Earth-like planets is due to start in the next two years. Then Hawking has supported the initiative of U.S. President Barack Obama on the landing of American astronauts to Mars in 2030.
However, it appeared that the dream of space colonization may simply not feasible because human physiology is not designed for space travel. People actually tied to their planet and can not withstand prolonged space travel. For the proper functioning of the human body requires Earth gravity. The consequences of its absence observed in astronauts after non-durable on space standards of weightlessness. After spending nearly six months in space, people lose the ability to move independently, they are weakened and require intensive rehabilitation course, and the journey to the same Mars could take years and years.
Scientists note that the first in a prolonged weightlessness will begin to suffer heart. Observing changes in the body of astronauts, it was recorded that after a week-long stay in space undergoes atrophy of the heart muscle, the heart is reduced and blood pressure, in turn, increases. Returning to earth, the astronauts to the ISS for several months in temporary partial loss of vision and dizziness due to insufficient blood supply to the brain.
Atrophy observed on the example of the leg muscles, which are both gravity conditions would be quite unnecessary agencies. Despite the special set of exercises to develop the muscles in the weightless conditions, for only six months in space, astronauts lose up to 13% of the calf muscles, and the power load withstood them after traveling in zero gravity is reduced by 32%.
Of weightlessness affected metabolism. Fats begin less oxidizable, and thus the muscles can begin replaced by adipose tissue. At the same time, there is a significant imbalance of the immune system of astronauts.
Most of all in zero gravity begin to suffer bone, as well as reducing stress leads to loss of bone material. In fact, the bones lose minerals, especially observed in those parts of the skeleton, which in terrestrial conditions are at the greatest load. Even the intense training does not help to prevent the change. During the six months astronauts can lose about a quarter of the bone material from the tibia.
In one of the experiments carried out in space, scientists have found that bones grow more slowly than collapse. In general, the bone tissue is lost in space at a rate of 1-2% per month. Hence, the three-year journey to Mars, astronauts lose about 50% of its skeleton, and in fact will not be able to exist in the Earth’s environment. Although bone loss can be restored during training in orbit.
In fact, to not suffer irreversible health effects of space travel is necessary to build ships with its own gravity, which so far exists only in theory.
But by far the most suited for space travel are invertebrate animals such as jellyfish.
The news produced Oksana Skripko