10 reasons to believe in the existence of extraterrestrial life
Despite the skeptical views of the public majority, alien life forms - developed or at least a simple - is likely to exist somewhere in the vast universe. Moreover, many scientists agree that to deny it is pointless. Of course, this does not mean that it is necessarily about some stereotypical gray aliens with large heads and eyes, kidnap people. But even just in terms of figures and statistics, somewhere in the universe right now some space microbe or "space mosquito" engaged in their usual daily business. So let's look at 10 reasons why, according to which we can at least believe that extraterrestrial life out there somewhere still exists.
The law of large numbers
Even if the actual number of discovered planets is constantly changing, and in some cases even decreased due to lowering the status of some celestial bodies and formation them to rank lower, for example, in the category of dwarf planets, in a general sense, scientists agree that in space there billions of worlds, solar systems and galaxies.
If we consider the universe as a kind of boundless space, from the point of view of mathematics it is necessary to take into account the likelihood that in the infinite space has the same innumerable planets. In addition, it also speaks to the fact that the search engine to find a countless variety of something really worthwhile to be very, very difficult. Too huge scale search.
If we assume that only 1 percent of these planets may be habitat for life, you get just astronomical number of potentially habitable worlds. Among this variety may be present and a certain fraction of planets very similar to Earth, with its variety of species inhabited. In this case, we can say that the aliens in space even more than we can imagine. But then again, as long as science does not provide solid evidence, all such arguments will always be in a society considered far-fetched and premature.
The water is everywhere
If the water is the key to the emergence of life, then we have good news because water has almost everywhere in the universe. Again according to the scientists. However, most often it is found in solid form, ie in the form of ice. But, again, not necessarily everywhere. The only one in our solar system, there are several satellites of the planets, where there is water. And the more likely it is there where it is in liquid form.
About the same Mars, and the presence of water on it in one form or another, scientists still argue, but as for the other celestial bodies like the same satellites of gas giants Jupiter and Saturn, they just show all the signs of the presence of liquid water. Perhaps the most obvious among them is Saturn's moon Enceladus, is ejected from the cracks on its icy surface of the huge jets of water vapor and ice particles into space. Among other things, this may indicate that the satellite is still going on geological activity that, in turn, may contribute to the emergence and development of life.
The diversity of
Now science is mainly aimed at the search for life forms that are similar to us, or at least some forms of life, which for the emergence and development of the conditions needed and the elements that were present on Earth. However, we somehow ignore the option, according to which life forms on other planets would appear to exist in completely different conditions and environments. Other so that these forms of life would indeed seem unrealistic and alien to us.
Options, again, can be a great variety. Why not assume that somewhere in the universe there is life in liquid or gaseous form? Maybe life on other planets has a completely different genetic code and is based entirely on the other chemical elements and can exist in a completely intolerable from a human point of view the conditions. Such assumptions are partially supported by the ever-increasing number of discoveries of so-called extremophiles, organisms that is able not only to survive, but also quite a comfortable existence in a very harsh environment on Earth. They are found in the permafrost, and even within the volcanoes. So why not assume that such organisms could exist in the same environment of the frozen Mars or in the same fiery hell of Venus?
Could it be that we have not found the aliens, not because they are not, but simply because they do not know what they will be like? It is possible that extraterrestrial life exists in such unexpected ways that we can not even for us to understand - whether it's life in general.
The rapid development of life on Earth,
Again, when it comes to the relative yardstick, life on Earth, and in particular people on the planet were literally just yesterday. According to some researchers, such a dramatic emergence and evolution of life forms may indicate that this is not just a very strange good luck. On the contrary, it may indicate that such may take place somewhere else in the universe. In other words, perhaps we are no special, and our appearance is a normal reaction to the planetary evolution.
Some people believe that long ago existed on Mars life. This was when the planet still possessed a sufficiently dense atmosphere and had on its surface liquid water on Earth. Similar views were expressed in the direction of Venus. They say that she, too, was once like Earth, but some large-scale catastrophic events gave rise to a powerful "greenhouse effect", which significantly raised the temperature on its surface, and eventually turned into a lifeless space body.
The universe is rejuvenated through supernovae
Scientists say: if we divide the human body into atoms, then it turns out that its molecules are 97 percent composed of the same elements as the galaxies in the universe. In other words, we are all children of the stars, how loud it sounds. Our universe is full of innumerable cycles of death and birth of new stars, flowing through a series of stellar explosions, called supernovae. Scientists are sure that the gas and dust clouds, which are used for the formation of new stars, contain organic molecules, the so-called building blocks of life. These molecules are transferred from one corner of the universe to the other by comets and asteroids, until eventually not fall on the planets and moons forming around stars.
Despite the fact that scientists generally agree with the theory of the origin of life on Earth through the comets contain these building blocks of life, they do not know where, and most importantly, when the process was first introduced. The correct answers to these questions may be found in data collected using the "Atacama large millimeter-wave array antenna" (ALMA), the most powerful network of radio telescopes in the world. The fact that ALMA has found chemical signatures of life in interstellar gas surrounding young stars in the constellation of Ophiuchus, which is about 400 light years from Earth.
"This is a family of organic molecules involved in the synthesis of peptides and amino acids, which in turn are the biological basis of the life that surrounds us", - explained Audrey Kutens from University College London.
Scientists believe that ALMA discovery proves our assumptions about how life appeared in our solar system. If this is true, then the emergence of other new stars may have led to the emergence of other forms of life somewhere in the universe.
We are too noticeable on the background of the cosmos
The skeptics of the theory of the existence of life elsewhere in the universe has been often argued that the Earth is unique in its kind. Ostensibly it is the only planet in the universe where life exists. Some agree with the uniqueness of the Earth, but do not always agree with the reason of this uniqueness. If a whole to look at our solar system and do not take into account the Earth, it actually seems to be completely lifeless. Or at least devoid of reasonable and technologically advanced civilization. So why not assume that among the variety already detected and an even greater diversity have not yet found our worlds, located in the habitable zones of their stars, could have at least one planet, home to any reasonable and even very technologically advanced civilization, but at the same time for her, our solar system may seem completely uninhabited? Perhaps in this lies our uniqueness? Maybe we're just too noticeable on the background of the rest?
What if now some extraterrestrial intelligence is watching our system, sees it as a kind of blue planet, but it does not attract as by his standards is part of a group of lifeless, according to his standards? Besides, why should we exclude the possibility that the mind is watching our planet, but, as we are more in relation to other exoplanets, uncertainly makes the assumption that if there is on this blue ball though something alive? In this case, an exact answer to this question, as we do, he can not because he lacks the evidence of knowledge or just the right level of technology.
Asteroids, comets and meteorites
Many scholars at different times (as, indeed, even now) were convinced that extraterrestrial life could reach the Earth (and in general of any planet in the universe) riding on some asteroid, meteorite or comet. Substantial support for this hypothesis has been at the end of the 20th century, when, after the analysis of the fallen on our planet cosmic bodies, scientists have made a surprising discovery.
Probably the most noteworthy event occurred in 1984 in the Antarctic, where scientists have found a meteorite from Mars, later called ALH84001. After his studies experts make a loud conclusion - on the Red Planet once existed life. In 1996, during the analysis of the object in its internal structure have been discovered fossils of once-living microbial forms. At that time it was the most compelling evidence that at least the most basic forms of life used to be able to dwell on the surface of Mars. Can we conclude from this that life on our planetary neighbor still there? And if she could not in that time somehow evolve? Finding answers to these questions just now engaged in several rovers and orbital probes. If you calculate how much all the different comets and asteroids fell on our planet ... Well, who knows how many germs as a result of them povylazilo and assimilated within the ecosystem of our planet. The most famous case of a meteorite on Earth is considered to be an event that occurred in 1908 in the vast Siberia and later became known as the Tunguska meteorite. Somehow, it seems that whether the researchers the opportunity to study at the time the crash site using current modern scientific tools, then people would expect a lot of interesting and very important discoveries.
Life is not limited to the planets
Of course, not only the planets are considered by modern science as a potential habitat of the various forms of life. Get at least our solar system. Some scientists are so convinced that some of the satellites of the planet can be inhabited at least microscopic organisms that almost personally want to fly and everyone to prove it.
As has been pointed out in previous articles, some moons of our gas giants are all signs of geological activity, the atmosphere and even the presence of water in liquid form. Therefore, when the opportunity to explore the distant frontiers of space in more detail we will surely be able to find the satellites, more suitable for life than their native exoplanets.
Hints in our past
Supporters paleocontacts theory believe that evidence of the existence of aliens are seen in some of the ancient monuments of the Earth culture: rock paintings, sculptures, legends and epics of the past.
In addition to the ancient writings, which either directly or indirectly, or almost directly, according to the theory supporters allude to visit our planet alien beings, a great emphasis is placed on some unexplained periods of human evolution. In particular, we are talking about is not quite understand the process that allowed some wretched amoeba virtually instantaneously (on space standards, of course speaking) to develop such a such a complex, multi-functional and effective body, as the human brain. If you find that extraterrestrial intelligence is really in some way influenced the course of human history, it is not easy to prove the existence of aliens. This proves that our cosmic neighbors, we have much more in common than many might think. This will lead to the fact that we have to overestimate all that we knew about their collective past.
No, do not misunderstand: the majority of stories about the alleged meeting with UFOs and even aliens are planted in the fields and stealing livestock and even humans, are nothing more than the ravings of a madman, misguided or simply too highly sensitive individuals. Virtually all cases of UFO sightings can be explained scientifically. And the fact that it is impossible, is again the subject of science, which simply has not reached the level to do this. At the same time, scientists are not ashamed to admit it.
However, such statements accompany the history of mankind is not one hundred years. They come from a variety of people, ranging from the banal fraud, seeking fame and fortune (books about "events" somebody wrote in the end), to quite decent people who are risking their reputation, telling such things.
Again, as a popularizer of science once said Neil deGrasse Tyson, if you, for whatever happens to be on a spaceship of aliens, what would you see there neither will be the subject of a priceless evidence of the existence of intelligent extraterrestrial life. Science is not enough of your statements that you have something to see. Over its history it has repeatedly argued that the witnesses are the lowest form of evidence. Therefore, being on a spaceship aliens, do not rush out to make feet. It is better to try to divert their attention away from yourself and grab any thing that comes to you by the arm. Even won that thing, like a cosmic ashtray. Because it is such forms of evidence are interested scientists. But is everything these stories are only the subject of imagination, misunderstanding and misconceptions people? Or, among them there is some proportion of real contact?