Is there life on Mars?

No one from the National Aeronautics and Space Administration (NASA) landed on Mars? Insight? The (Insight) probe landed on Mars in the early morning of 2065438+2008165438+1October 27th. A new round of Mars exploration implementation plan was launched. Whether there is life on Mars and whether it is suitable for human migration is also one of NASA's exploration tasks. To this end, President Trump signed a bill for NASA in March 20 17? In fiscal year 20 18, the appropriation reached19.5 billion USD, and the goal of manned landing on Mars in 2033 was put forward.

Mars has always been considered as the most likely planet in the solar system to have extraterrestrial life. Since the second half of the last century, NASA has had many reconnaissance equipment, including Curiosity and Odyssey, which landed on or flew around Mars, and some of them are still working today.

These testing devices? Do you see it? This is a desolate and lifeless land. The surface of Mars is basically desert, and there is no stable liquid water body. The atmosphere dominated by carbon dioxide is thin and cold, and sandstorms often occur. They dug up some soil and analyzed traces of microorganisms and organic compounds. And nothing was found. This red earth-like planet seems to be a frozen desert bathed in deadly ultraviolet radiation, and there seems to be no sign of life.

However, with the deepening of the exploration of Mars, scientists' views began to change. It may be too hasty to say that Mars is not the home of life. In recent years, more detailed photos from Mars have revealed some landforms that look like floods hitting plains and dry lake bottoms, and even the remains of ancient oceans. According to online data, in September of 20 15, NASA announced that there was a small amount of water on Mars. 2065438+In July 2008, the European Space Agency (ESA) said that a liquid groundwater lake had been discovered on Mars.

Obviously, Mars used to be warm and humid, no different from our earth. So in the distant past, was there ever a life there? Will there be life growing in today's dim environment?

Mars, as a planet in the solar system that can be reached by human exploration except the earth, will receive special attention. Research such as NASA's Origin of Life Project is expected to produce possible technologies for finding life on Mars.

Scientists believe that the surface of Mars is terrible for any life with liquid water as its source. Although there is some ice at the poles, the temperature is too low to melt. Even if it melts, the liquid will evaporate quickly, because the atmosphere of Mars is less than 1% of that of the earth. It is estimated that Mars, which once had liquid water and warmth, ended about 3.5 billion years ago. Today, the best hope for finding life there is in the subsurface region. Because some microorganisms can live deep underground, their energy for survival comes not from sunlight, but from the chemical energy and heat energy of gases and minerals in the earth's crust, which are directly converted into biological energy, thus maintaining a food chain independent of terrestrial organisms.

Astrobiologists speculate that it is unlikely to find any life more complicated than simple bacteria on Mars. Complex life probably needs a planet like the earth: an ecological structure with a thick atmosphere, liquid water, ozone layer and atmospheric gases (such as carbon dioxide) circulating.

At present, the exploration of life on Mars is stalled in the coming success? The gate? Many things still depend on new evidence. NASA's next manned landing on Mars is expected to finally understand Mars and uncover the truth about whether there is life on Mars.

In view of the deterioration of our earth's ecology and the serious shortage of resources, some scientists and industrialists (such as elon musk) have opened their minds, thinking that the surface of Mars is the second safest place in the solar system, and proposed that they can immigrate to Mars in a short time.

They think it is possible to immigrate to Mars, because Mars, like the Earth, is located in the livable zone of the solar system, a little far from the sun, with a low temperature, which is tolerable with the help of modern technology. The mass and volume of Mars are smaller than that of the Earth, and its surface gravity is about 2/5 of that of the Earth, which is also within the acceptable range.

However, professionals question that except for a few scientific explorers landing, the plan to immigrate to Mars in the next 50 years is not reliable. If human beings want to settle on Mars for a long time, the technology needed to establish a large-scale life support system (base) on Mars is not ready, and the immigration plan is impossible at least in the near future.