The real reason why we still have not found ET
Only one Milky Way, according to various estimates, may contain from 100 to 400 billion stars. Potentially, next to each of them may be the world. Only in the observable universe can be at least two trillion galaxies, each containing billions of planets orbiting hundreds of billions of stars. And even if among so many planets, those that will be able to support life, very, very small, somewhere in the universe should still be intelligent life other than our own.
The calculations say that if only 0, 1 percent of the planets in our galaxy are only potentially liveable, then it will have on the order of one million planets on which life can be. Such calculations have prompted the Nobel laureate Enrico Fermi to ask: "Hey, so where do you go?". This question is a prerequisite to the so-called Fermi paradox, and, according to modern scholars, the most likely answer to it will be associated with the man himself.
There is such a hypothesis - "Great Filter". According to it, until such time as a reasonable life will leave the confines of their home world, it is necessary to overcome a certain wall. The same great filter. The hypothesis states that in a global evolutionary process, there are some transitional issues that will have to overcome any intelligent civilizations to be able to communicate with other worlds. For some civilizations, these transitional moments can take place at an early stage of life, and in our case, we only move at this point of evolution. From this the conclusion can be counter-intuitive conclusion that the lighter was our evolution to date, the worse the chances of mankind in the future. Get at least climate change. Regardless of whether you believe in them or not, if they will be put to itself, it eventually will destroy most of the known life on Earth. The last 12,000 years or so, the planet's climate has been remarkably stable, which allowed human civilization to flourish, moving from agriculture to industrialization, which, ironically, may all of us and destroy them.
As part of recent studies have found some characteristics and features of living species most likely to allow them to survive in the world, underwent global climate change. The two most important features are the ability to non-selectivity and rapid reproductive cycle. On this basis, we can conclude that people will not take place among the surviving primary species. This also can make another conclusion: despite the fact that events on other planets (those transition periods) may develop in a different way, there is a high probability that the way of life that existed on this planet, there were so many obstacles that civilization ultimately could not overcome them.
"In the age of the universe billions of years, which are divided star systems is not only space but also time, civilization can emerge, grow and eventually wash its hands so quickly that simply do not have time to find their own kind. We ourselves live in an age of a new mass extinction, which has only just begun. We expect a lot more deaths, "- writes columnist for New York Magazine, David Wallace-Wells.
In many other thinkers have their own answers to the Fermi paradox. In some cases, they are even more depressing than this, in some less. Here are a few examples.
Anders Sandberg, an astrophysicist at Oxford, a member of the Astronomical Observatory of Belgrade Milan Cirkovic and Stuart Armstrong, an expert on artificial intelligence believe that aliens are not extinct, but simply are dormant, waiting for the general cooling of the cosmic background of the universe.
Professor Zara Osmanov from the Free University of Tbilisi believes that our search for alien megastructures sooner or later has met with some success, but here we are looking for them is not in the stars, you need to. A need to seek the opinion of Osmanova near pulsars.
Physicist Brian Cox suggests a variant in which the other extraterrestrial affairs could end sadly, so there is a possibility that they may end up the same way and for us.
"Why not assume that the growth of science and engineering could transcend political and social norms and customs, and everything went so out of control, leading to a catastrophe", - says Cox.
"If intelligent life on another planet, that not wishing, as himself and destroyed under the impact of the development of its technology, why, indeed, should exclude the possibility of a similar fate for humanity?"