What is the portrayal of immigrants in the looking backwards cartoon?The way immigrants are shown in the looking backwards cartoon is hard to predict. It could be a positive image, showing their contributions and achievements, or it could be a more complex portrayal that explores various aspects of their lives and experiences in the context of the story being told.
2030 Mars ImmigrantsSome scientists and entrepreneurs proposed a plan to colonize Mars by 2030. For example, Robert, the president of the Mars Society, once said that humans would appear and settle on Mars by 2030; Elon Musk also planned to send three million people to live on Mars by 2030; and NASA also set a plan to send the first batch of humans to Mars in the late 2030s or early 2040s.
However, Mars immigrants faced many challenges. The first problem was transportation. With current technology, it would take half a year to reach Mars. The second problem was survival. Mars 'natural environment was harsh. Although the highest temperature was 35 ° C, the temperature at night could drop to-73 ° C or even-100 ° C. Its surface was covered by deserts. Sandstorms occurred irregularly and could last for weeks and months. The air was mainly carbon dioxide and the atmosphere was thin. Although there was a possibility of discovering liquid water, human technology was currently unable to mine and process water resources on the surface of Mars, making it difficult to meet the daily needs of a large number of immigrants. In addition, it was not easy to build a living system that could accommodate a large population. To achieve large-scale immigration on Mars, Mars needed to be transformed, such as warming the Mars climate, increasing atmospheric pressure, and making liquid water flow. However, this process faced huge challenges.
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The Disadvantages of Martian ImmigrantsThere were many disadvantages to migrating to Mars:
1. ** Radiation hazard **: The surface of Mars basically has no magnetic field and is almost completely exposed to space. The radiation is very strong. Galactic cosmic rays existed for a long time and were difficult to block. The protective effect of the outer shell of an ordinary spacecraft (even a 30-centimeter-thick aluminum plate) was minimal. Although the high-energy particles produced by solar activity could be protected by the outer shell of the spacecraft to a certain extent, they could still cause cancer, central nervous system damage, typhoid, and other diseases. The amount of radiation an astronaut received during a 180-day routine trip to Mars was equivalent to the accumulated radiation of a nuclear power plant employee for 15 years.
2. ** Low gravity problem **: Mars 'gravity is only 40% of Earth's gravity. If humans are in such a state of weightlessness for a long time, it will cause changes in the water distribution in the body, decrease in plasma capacity, loss of cellular fluid, abnormal cardiovascular function, and mutation of spleen cells, which will lead to diseases such as epilepsy, muscle wasting, and decreased immunity. At present, it is difficult for humans to overcome the low gravity of Mars.
3. ** Atmospheric environment is harsh **: Mars 'atmosphere is extremely thin, mainly composed of carbon dioxide, lacking oxygen for breathing, and there are a small amount of toxic gases. Long-term residence will endanger life.
4. ** Large temperature difference between day and night **: The temperature difference between day and night on Mars is extremely large. In just one day, there will be a temperature change from summer to winter. This will cause the body to lose water rapidly, the blood in the blood vessels will be extremely condensed, and the body cells will be severely damaged, causing fatal damage.
5. ** Other health effects **: High radiation environments will increase the incidence of cancer and leukemia. Even if they live in underground bases or wear anti-radiation suits, the skin color of Mars immigrants will be darker. In addition, the Mars mission itself and the living conditions on Mars will lead to side effects such as weight loss, muscle wasting, bone degeneration, and exposure to sandstorms.
6. "Communication and Earth Affairs Impact: Mars is too far away from Earth, which may lead to a lack of communication with Earth and a lack of understanding of Earth's affairs. If we can't establish a sustainable presence on Mars, we may lose money and lives. It may also affect our ability to solve Earth's problems. It may even weaken our military strength and make Earth more vulnerable to attacks from major powers. In the case that humans still had uncured diseases such as cancer, Zika virus, and ebola virus, it might be unrealistic to invest in a Mars colonization mission.
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