What follows from these numbers, approximate though they are? One thing above all: the cosmos is vast beyond intuition and unimaginably old. We still do not know the full size of the whole universe, but the observable universe is commonly estimated at roughly 90 billion light-years in diameter<\/strong>. And we know quite well how large our own small galaxy is.<\/p>\n\n\n\n Light needs about 100,000 years<\/strong> to cross the Milky Way from one end to the other. By contrast, our current spacecraft move through space at a pace so slow, in cosmic terms, that interstellar travel remains almost absurdly difficult.<\/p>\n\n\n\n Once we count the galaxies and the stars, and assume that some of those stars have planets<\/a> and some of those planets offer conditions suitable for organic life, the conclusion seems obvious: the cosmos should be inhabited by an enormous, perhaps staggering number of civilisations, including some far more advanced than our own.<\/p>\n\n\n\n And yet we cannot prove the existence of even one.<\/p>\n\n\n\n Modern science now allows us not only to discover planets, but also to search for so-called biosignatures and technosignatures \u2014 clues that life or advanced civilisation may exist on a given world. NASA\u2019s exoplanet resources now describe more than 6,000 confirmed exoplanets<\/strong>, with archive updates in 2026 placing the count at 6,147<\/strong>. And still we have confirmed neither alien life nor alien civilisation.<\/p>\n\n\n\n Of course, we are only at the beginning of the journey. There are likely billions upon billions of planets, and we have detected only a tiny fraction of them. The ones we find most easily are often worlds far less hospitable than Earth, since Earth-like planets are harder to detect.<\/p>\n\n\n\n This is the question famously associated with Enrico Fermi: if the universe is so large and so old, and if even simple statistical reasoning suggests that intelligent life should be widespread, then why is the cosmos still silent?<\/p>\n\n\n\n Scientists have proposed many answers.<\/p>\n\n\n\n One of the most memorable is the dark forest theory<\/strong>, according to which civilisations deliberately hide<\/strong> because they fear destruction by others more advanced than themselves. The idea is gripping, but it requires us to believe in a near-universal conspiracy of silence across the cosmos, born of fear and sustained with extraordinary consistency. That would be not only strange, but statistically hard to credit.<\/p>\n\n\n\n Another possibility says that civilisations destroy themselves before they become truly advanced. But again, this would mean assuming that every civilisation carries within it the same drive toward self-annihilation before it manages to spread beyond its home world. That, too, would be a curiously repetitive fate.<\/p>\n\n\n\n There is also the possibility of a hyper-advanced civilisation that eliminates all competitors. But could any civilisation really wipe out every rival not only in our galaxy, but across the whole universe<\/a>? To do so, it would need a level of development so far beyond ours that it would approach the godlike.<\/p>\n\n\n\n Another theory proposes that alien civilisations exist, but we are unable to recognise them because they are radically unlike us. Related to that is the cosmic zoo hypothesis<\/strong>, the idea that we have been deliberately isolated so as not to disturb our natural development, while more advanced beings quietly observe us.<\/p>\n\n\n\n If we lived on a planet that had formed soon after the birth of the universe, we might say: of course we are alone, the others simply have not had time to emerge. But Earth is young.<\/p>\n\n\n\n There are planets older than Earth by 1 billion<\/strong>, 2 billion<\/strong>, even much more. And our own technical civilisation is barely more than a blink: radio has existed for less than 150 years<\/strong>, and spaceflight for only about 70 years<\/strong>.<\/p>\n\n\n\n Do we really believe that, at this rate of change, we would not achieve some enormous technological breakthrough in a million years<\/strong> \u2014 a period that is trivial on the cosmic scale? If so, why has no one else done so already? Why has no civilisation born on a world older than Earth managed to leave a clearer trace?<\/p>\n\n\n\nThe Cosmos Should Be Full of Life<\/h2>\n\n\n\n
But What If Life in the Universe Does Not Reach Us?<\/h3>\n\n\n\n
![\"Nebulae](\"https:\/\/holistic.news\/en\/wp-content\/uploads\/2026\/04\/life_in_the_universe_1-1024x576.jpg\")
The Fermi Paradox: Why Is the Cosmos Silent?<\/h2>\n\n\n\n
Are We Alone? Or Is Something Else There?<\/h3>\n\n\n\n
Life in the Universe: Are We Billions of Years Too Late?<\/h2>\n\n\n\n