H.G. Wells's novella "War of the Worlds" tells that the Martian war machine wants to wipe out human beings from the earth, so it invades the earth, and the darkness of the end of the world hangs over people's heads, at the beginning of the book, the author says that we humans have seen and heard a lot of end-of-world stories, telling that humans seem to have fallen at the feet of alien civilizations.

But is our planet really that vulnerable to the invasion of alien civilizations? Here is The Astronomical Online, and today we will answer the question - can an alien civilization survive on Earth? Do you also want to know what the facts are? Are you curious? Then subscribe to us so you can get more relevant content.
For that question, we can first think of us as aliens, and then think about what we would do to other planets in this case, and for the answer to this question, I think a big part lies in what the planet we are going to look like, but think about the planets close to Earth, they seem to make people feel less like they want to, if we want to survive on it, we either use some geochemical technology to build advanced space stations, or we can accurately simulate the environment of The Earth.
Therefore, it is important to look for terrestrial planets in the wider universe. But even if we find a planet with an atmosphere and temperature that is very close to Earth's, the threat of disease should not be underestimated. We have no idea what germs and toxic substances there are in the outside world, and before we can send a real human to visit any other planet, we need to spend decades on interstellar reconnaissance missions, just look at how much time we spend studying Mars.
It's useless to try to inadvertently find an environment on an extraterrestrial planet that is safe for humans by chance, so aliens will face pretty much the same problems, whether with friendly or other ideas. Even if they were to invade Earth, they would have to prepare in advance, or they would risk failing their invasion plan as soon as they reached Earth. But in the same way, if they visit Earth in a peaceful manner, they have to understand the nature of the Earth before they come to It, and if they come to Earth with a peaceful attitude, they may still have the opportunity to get help from us humans, as we have always done.
Helping and assisting them may be a risky act, but it may also be an opportunity to establish a good relationship with a unique, intelligent, and advanced alien civilization. For us, this will be a big part of our scientific research, and then we can use their technology and wisdom to help us achieve our goals in space faster, and the dream of interstellar travel can be realized faster. At the same time, for aliens, it is okay to have a positive relationship with the local inhabitants of the planet they have just arrived
That is, the difference between life and death. As pioneers, human beings will at least have a better understanding and response to the situation in this land. Help them survive here, and we'll be better off surviving elsewhere. But while it sounds good to have a good and benign relationship with an unknown alien, and Wells's World Wars is only partly inspired by conflicts at different times, the concise history of humanity tells us that this may not necessarily come true.
If there are any alien beings who have successfully arrived on Earth from a distant galaxy, they have revealed an overwhelming level of technology and insight – far beyond anything we can dedicate. So, if these aliens carry weapons or have any aggression, then even if we earthlings have the advantage of home, we earthlings will not be able to defend ourselves. The answer to the question of whether aliens can survive a war on Earth, if technological leadership equals battlefield victory, is almost certainly "yes."
Such a conflict may not even play out on Earth, as latent alien invaders are more willing to target our planet from a distance – and are determined to surround it rather than land on it. Whatever their purpose, such a delayed approach is key to their survival. This will also give aliens time to spy on Earth without putting themselves in dangerous positions. For the conquerors of force, they will find ways to eliminate all life on Earth that poses a threat to them; for the visitors of peace, they will give ample time to find ways to communicate with humanity.
At present, the biggest threat to these aliens is various diseases on Earth, so in either case, the next step for aliens will be to send instruments such as probes and rovers to Earth to avoid any potential irreversible biological risks. Life on Earth has lived for millions of years and is still susceptible to disease. There are some major diseases that we don't even have a reliable treatment for, or vaccines that can be dealt with.
Antimicrobial resistance, as listed by the World Health Organization, is one of the most threatening diseases to modern life, and our existing preventive measures will soon have little effect. By then, for newcomers and less well-adapted aliens, even relatively conventional problems like the flu will be fatal to them. Furthermore, many of our vaccines rely on herd immunity – that is, many people are effective. If nothing else, aliens will first violate the laws of nature. All of the above shows that even if we go to war with them, it is very likely that it will be a war on biological weapons, not nuclear weapons.
Even so, however, history shows that in the face of an unknown disease, entire human societies can be rapidly destroyed. We humans are very vulnerable to an unknown plague, just as life from aliens faces the microbes and bacteria on our planet. The problems that extraterrestrial life encounters in surviving on Earth are theoretically very similar to the difficulties faced by human groups to survive elsewhere on Earth, the only difference being that we know we are competing with other creatures.
In general, extraterrestrial life must first determine that it can adapt to the most important atmospheric environmental conditions on Earth, and have the ability to survive based on the resources it already has, and if humans begin to attack it, they must also have enough capacity to withstand it in this dangerous situation. Meeting all these demanding requirements is difficult, so if there are survivors after the bumps and challenges of the road, then it's reasonable to guess that they already have everything they need to survive in the long run! What do you think?
Related information:
Planets are celestial bodies orbiting stars, or remnants of stars, massive enough to make them spherical due to gravity, but not too large to trigger their own thermonuclear fusion. In addition, according to the International Astronomical Society, a celestial body that can be defined as a planet has the ability to clear small bodies near its orbit1, although not all planetary scientists agree with this definition.
"Planet" is a word that has been used since ancient times, and it has been associated with history, science, astrology, mythology, and religion. With the exception of Earth, there are five planets that are mostly visible to the naked eye, and they were sacred in early human civilization and were regarded as messengers of the gods. With the development of science, human understanding of planets has changed, and many different objects have been incorporated into the concept of planets.
In 2006, the International Astronomical Association adopted a resolution to delineate planets in the solar system, which was widely debated for its inclusion in the investigation of the orbits and orbits of celestial bodies2, excluding many objects with planetary masses. While the eight planets discovered before 1950 are still planets in the current resolution, some of the objects that were once considered planets, such as Ceres, Homo sapiens, Zona , Vesta (which are all objects in the asteroid belt) and Pluto (the first object outside Neptune discovered3) are no longer planets in the new definition.
Ptolemy believed that planets were celestial bodies that orbited the Earth at the current and average wheels4. Although the idea that planets orbit the sun has been proposed many times, it was not until the 17th century that this idea was confirmed by observations from the first celestial telescope invented by Galileo. Around the same time, Tycho's assistant Kepler discovered by carefully analyzing observations from the Celestial Observatory5 that the planet's orbit was elliptical rather than perfect. As observational techniques evolved, astronomers discovered that, like Earth, each planet has an axis inclination6 (the angle at which the axis of rotation is tilted relative to the orbital plane), and some of these planets also have ice caps and seasonal phenomena on them. At the dawn of this space exploration, close observations of planets were made possible, and existing space probes have found other planets that have volcanic effects, hurricanes, geology and hydrology like Earth.
by:.,_AN_,归零