Thus, according to forecasts of Australian scientists, by 2300, due to global warming, humanity will not be able to exist normally on Earth. A change of the thermal regime will change the moisturizing regime. All this may undermine the natural water cycle. The speed of the increase of temperatures and the reaction of the entire climate system to this factor will play a decisive role in the process.
According to Australian experts, in 300 years, more than 40 percent of land will be flooded. The remaining part of the land will quickly use up all available resources and become unsuitable for human life. The scientists say that in 300 years, average annual temperatures will grow by 12 degrees, which will have a devastating impact on people.
Como dice Stephen Hawking:
"We must continue to go into space for humanity. We won't survive another 1,000 years without escaping our fragile planet,' he said. "Spreading out into space will have an even greater effect. It will completely change the future of the human race and maybe determine whether we have any future at all," he said in Los Angeles.
Aunque no es tan sencillo:
For example, flying to Mars will take a few years, but a human being simply can not leave their home planet for such a long time - human physiology and biology are closely connected with the Earth. Human body can function properly only under the conditions of gravity. The devastating effects of weightlessness can be seen by looking at astronauts returning to Earth after a long stay in space. These bodies are so weak and exhausted that they can not even move without assistance.
All this pales in comparison with negative changes that may occur after the flight of man to Mars. Astronauts suffer from heart diseases. After one week in weightlessness, the human heart becomes significantly smaller in size, which reduces the volume of the engine of our body and increases blood pressure.
After several months of life on the ISS, astronauts, when back on Earth, suffer from persistent dizziness and even temporary blindness. The blood circulation to the brain is not sufficient enough in space. Space explorers also have problems with the muscle tissue, especially with leg muscles. Negative changes occur in metabolism as well. The level of fat oxidation decreases, which may eventually result in the replacement of muscle tissue with fat tissue. Weightlessness is a great danger to bone tissue. In weightlessness, a human being loses up to two percent of bone tissue a month. Thus, during a three-year journey to Mars, astronauts may lose about half of their bones ...
Is Mars going to be the last stop for manned space flights?
A manned flight to Mars has became a fixed idea recently. According to scientists, in the next 3-4 decades, man will be able to land on Mars. But people can never get enough. When Mars is conquered, people will try to fly farther. No one says that it is impossible, but there are many obstacles. Thus, the director of the Institute of Space Research, Lev Zelyony, believes that humanity should not delude itself in vain illusions. He is convinced that Mars will be the end point of our space flights. Man will not fly farther.
According to him, space radiation will become the biggest obstacle. Even on Mars, human beings will not be able to stay for a long time - they will die from radiation sickness.