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The Fermi Paradox II — Solutions and Ideas – Where Are All The Aliens?

Kurzgesagt – In a Nutshell | October 9, 2025



Where are all the aliens? The universe is too big and too old, why have we not met aliens yet? Do they live in computers? Were they wiped out by an ancient super intelligence? Or are we just to primitive to understand their motives? Whatever the answer is, it is incredibly important for our own future.

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Fermi Paradox II – Solutions and Ideas

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Written by Kurzgesagt – In a Nutshell

Comments

This post currently has 25 comments.

  1. @kurzgesagt

    October 9, 2025 at 1:01 am

    You want to learn more about space? Check out our space products on the kurzgesagt shop – all designed with love and produced with care.
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  2. @randomrobc

    October 9, 2025 at 1:01 am

    As humans develop so does the birth rate. Perhaps a super advanced civilisation would have have a few low birth rate and so they may not spread out to many planets.

  3. @dankgg2672

    October 9, 2025 at 1:01 am

    But we – humans thinking about how other life form would see us and making an analogy with animals and predicting their possible emotions towards us proves that we are smart ..but who knows , they can be smarter than us 🙂

  4. @PietroAbbondanza

    October 9, 2025 at 1:01 am

    FERMI’S PARADOX AND THE PROBABILITY-BASED SOLUTION: ANALYSIS OF THE SILENCE OF CIVILIZATIONS WITH A HIGHER LEVEL OF CONSCIOUSNESS

    INTRODUCTION
    The Fermi Paradox, which contrasts the high statistical probability of intelligent life with the complete absence of observational evidence, remains one of the most intriguing challenges in astrobiology. While many theories have been proposed to explain this discrepancy, the present work offers a probability-based solution. It suggests that the resolution does not lie in a destructive “Great Filter” preventing civilizations from advancing, but rather in accepting the scenario with the highest probability: that civilizations with a higher level of consciousness do exist, and that their silence is the logical consequence of their nature.

    THE PREMISES OF THE PARADOX, THE EVOLUTIONARY TIME GAP, AND THE GREAT FILTER
    The paradox rests on two fundamental premises.

    The first is the immensity and age of the universe. With hundreds of billions of galaxies, each containing billions of stars and a high likelihood of planets within habitable zones, the potential sites for life are vast. Time magnifies this potential: Earth formed about 4.54 billion years ago, while the universe is approximately 13.8 billion years old. The first stars and the heavy elements essential for life appeared between 2 and 3 billion years after the Big Bang, meaning that Earth-like conditions—and life—could have arisen elsewhere with an evolutionary head start of 6 to 7 billion years over our civilization.

    The second is the hypothesis of a “Great Filter,” a formidable barrier that makes the transition to a higher form of civilization extremely rare. Yet it should be seen as a filter, not an impassable wall. Even if the probability of overcoming it were infinitesimal, the sheer scale of the universe ensures that at least some civilizations would inevitably have succeeded. Statistically, the probability of at least one advanced civilization existing approaches certainty.

    Here lies the tension: despite decades of searching, we have detected no radio signals or other definitive evidence of extraterrestrial technology—the so-called “great silence.”

    THE NATURE OF A CIVILIZATION WITH A HIGHER LEVEL OF CONSCIOUSNESS
    Given such a vast evolutionary gap, the difference between us and a civilization with a six-billion-year advantage would be unimaginable. Such a civilization may have transcended the biological and technological limitations familiar to us, evolving into a collective consciousness no longer bound to physical bodies or single planets.

    They could harness the energy output of an entire galaxy (a hypothetical Type III civilization on the Kardashev Scale), without any need for radio communication. Their aims might be so distant from ours that we would hold no relevance for them. This would not be a simple extension of our current technology, but a qualitative leap into a form of existence that transcends our very framework of understanding. The term civilization with a higher level of consciousness precisely captures this transcendent nature, which lies beyond the concepts of technological progress or colonial expansion.

    THE PRINCIPLE OF MAXIMUM PROBABILITY AS A SOLUTION
    To address the paradox, we can apply a straightforward logical rule: between two mutually exclusive scenarios, the one with the highest probability should be considered the most plausible.

    Hypothesis A: Civilizations with a higher level of consciousness do not exist.

    Hypothesis B: Such civilizations exist, but choose not to contact us.

    Given the scale of the universe and the evolutionary time gap, the probability of Hypothesis A is negligible. Hypothesis B, by contrast, aligns with both the statistical inevitability of advanced civilizations and the observed reality of their silence. If their existence is almost certain, then the lack of contact is best explained not by their absence, but by a deliberate choice to remain unseen.

    CONCLUSIONS
    A probability-based perspective reframes the Fermi Paradox, shifting the question from “Where are they?” to “Why are they silent?” The most likely answer is not a catastrophic Great Filter that extinguishes life, but the conscious decision of civilizations with a higher level of consciousness to avoid interfering with our evolution. The “great silence” is thus not a baffling anomaly, but the expected outcome of a universe inhabited by beings whose wisdom and prudence surpass our current comprehension.

  5. @Comment-y1g

    October 9, 2025 at 1:01 am

    I might have found a near perfect solution to the fermi paradox it doesn’t revolve around any great filter dark forest or cosmic forces it’s just error on our part there is several several mini solutions number one we aren’t looking hard enough the universe is incredibly vast we are looking at small things that could be just be a small section of a larger whole number two our search parameters are two narrow because we only have a sample size of one the life on earth could be a small portion of what is possible we could overlook a lava planet that could be teeming with silicon based life that looks like rocks that eat lava and poop gems we could overlook a ice ball that could have life clinging to hydrothermal vents we could overlook a gas giant that is teaming with space whales number three we are doing it wrong our current search is listening in trying to hear alien signals but the aliens are trying to listen to our signals like a chess game where the players waiting for each other to make the first move number 4 we could of already got signals from aliens but we don’t know they were from aliens space anomalies could be aliens saying hello saying they are out there but we don’t communicate like them things tabby star oumuamua could be messages from aliens a hello we didn’t hear a hand we never shaked I number 5 space is infinite I will be surprised if you make a video about it to help you I will let you name it whatever you like and I am allowing you to take full credit for it and every other theory can be countered by a simple question why why would there be a great filter why is forest so dark why would a cosmic force destroy civilization why do aliens keep blowing themselves up

  6. @srikarb3350

    October 9, 2025 at 1:01 am

    But Why is no one talking about the possiblity that they do exist but since light itself takes time to travel to us, we just not have seen their existance, and similarly they might not have seen our!

  7. @legbreaker

    October 9, 2025 at 1:01 am

    Everything in this theoretical Fermi paradox is possible.The best hopes in our era are USS Nimitz, Kumburgaz and Ariel school in Zimbabwe. If true, who says these are beings from another planet, why not some other dimensional beings. My best guess is the Earth-Zoo hypothesis.

  8. @Renatus_Eruditus

    October 9, 2025 at 1:01 am

    Ironic that a key Scientist behind The Manhattan Project – instrumental in developing the first Nuclear Weapons – is remembered for a casual quip about the apparent lack of life on other planets…

    He said this a few short years after Hiroshima and Nagasaki. I guess it's not so ironic🤔

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