Why has extraterrestrial life not been found, is it really non existent?

Extraterrestrial life has never been found, and it doesn't necessarily mean that it doesn't really exist. Because the universe is very large, the places in the universe that humans can explore are still very limited, and there are still many places that humans have not explored, so human beings have not found extraterrestrial creatures at present. It is also possible that extraterrestrial creatures have specially blocked human signals and do not want to be discovered by humans.

Because the current science and technology are not enough, there is no evidence of the existence of aliens. However, aliens don't necessarily really don't exist, and it is possible that they will be found in the next few hundred years.

Extraterrestrial life is supposed to exist, it's just that our current human technology doesn't support us to be able to find them.

Not necessarily, the universe is vast and boundless, and there is not much success in human exploration of the universe now, maybe there are higher life forms like us in some unknown galaxy.

It has not been found only that it has not been found at the current level of science and technology, and with the progress of human science and technology, it is very possible to explore extraterrestrial life in the near future.

No one is sure about this now, from a long time ago, UFO flying saucers, to now there is no definite answer, human beings have been exploring extraterrestrial life, there has never been an end, maybe our direction research is wrong, extraterrestrial life does not necessarily need oxygen to survive, and our human exploration eyes will not stay there.

We know that the key to the birth of life on the earth is that the distance between the earth and the sun is moderate, and the temperature of the earth's surface can make water exist in liquid form, so that the evolution of life can be conditioned, so the earth is located in the habitable zone of the solar system.

In fact, the Milky Way also has the concept of habitable zones, and our solar system is located in this habitable zone. So, why is it said that the Milky Way or galaxy also has habitable zones? Through the search for extraterrestrial life, it is known that life is not easy to give birth to in the universe, and the evolution of life depends on many conditions.

If you are near the center of the Milky Way, where the star density is quite high, it means that supernova explosions are also more frequent, which can be fatal to life in the vicinity.

There is also a supermassive black hole at the center of the Milky Way, which emits deadly electromagnetic radiation when it accretes surrounding matter. In addition, if the solar system is close enough to the galactic center, then the objects in the Oort cloud will be easily perturbed by the gravitational perturbation of a large number of surrounding stars and fly into the solar system, which will endanger life on Earth. On the other hand, if you are at the edge of the Milky Way, or even in intergalactic space, although the environment there is stable, there may be a lack of heavy elements.

The only elements produced through the universe are basically hydrogen and helium, and the evolution of life depends on quite a few elements. Since heavy elements are formed during nuclear fusion reactions, supernova explosions, and binary neutron star collisions inside stars, these mechanisms are lacking for the remote suburbs of the Milky Way.

These places, then, are less likely to form terrestrial planets and less likely to evolve into life. Only when it is not close or far from the silver heart can there be suitable conditions to give birth to life. According to research, the habitable zone of our galaxy ranges between 10,000 and 10,000 light-years from the galactic center.

Our solar system is about 10,000 light-years away from the galactic center, just in the habitable zone.

All around us, we just don't realize that we are very ignorant, and the distance of understanding is extremely small compared to the universe! Aliens may not need water to survive!

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Does extraterrestrial life exist?

Does extraterrestrial life exist?

Many people, including many scientists, believe that there is still life on planets in the universe, but due to the distance or lack of scientific and technological capabilities, extraterrestrial life and we have not yet been able to meet, and in the future, or one day we will be able to discover extraterrestrial life or visit their planet.

Since the middle of the twentieth century, humans have used methods such as detecting radio waves beyond the Earth and astronomical telescopes observing potentially habitable planets to detect signs of extraterrestrial life, but so far there is no definitive evidence of extraterrestrial life. Some people believe that the chances of finding aliens are very small, and many people believe that extraterrestrial life must exist. A large number of reports about extraterrestrials, sci-fi** and movies have made the rumors of extraterrestrial life sound.