Fermi Paradox Simple Explanation. 23 Theories on Why We Haven't Found Aliens Yet?

In our galaxy, there are billions of planets that fall within the habitable zone of their stars. And among these, there are thousands of planets where life could exist. Our universe is so vast and so old that I simply refuse to believe that life exists only on Earth. Apart from Earth, there are millions of planets in this universe where life exists. I am not talking about one or two planets. I am talking about millions of planets. So if that is the case, why have we not found any alien to this day? Why do we have no proof of the existence of aliens? If aliens exist, where are they?

Well, this is what is called the Fermi Paradox. The probability of alien existence in this universe is very high. And by that logic, we should have found aliens by now. But finding aliens is a far cry — we do not even have any solid evidence about them yet. But why?

So let us decode the Fermi Paradox in this piece and understand why we have still not found proof of alien existence. We will decode this entire paradox through an iceberg chart. The deeper we go into this chart, the darker and more mysterious things will get.

So let us begin from the tip of the iceberg. I will explain the top points a little quickly, otherwise this will go on forever. So let's begin.

Tip of the Iceberg: The Simple Explanations

We Haven't Been Discovered Yet

This argument says that intelligent civilizations do exist, but they have not found us yet. If we talk about Earth, it is like a single drop in the entire ocean compared to this universe. Which is why aliens may not have found us yet.

Our Radio Is Not Advanced Enough

This says that the technology we currently have is not that strong. We have been broadcasting radio signals outside Earth for many years. And as these signals travel further, their strength keeps decreasing. Which is why it may be that aliens will never be able to detect the signals we have sent. Or it could also be that aliens use a completely different technology from ours — one that is perhaps far more advanced than ours. It is exactly like this: you want to talk to me, so you are trying to message me on WhatsApp. But I do not use WhatsApp at all. So there is no way we will ever communicate.

Space Is Too Big for Communication

This idea says that no matter how advanced we become, this universe is so vast that we will never be able to contact any alien civilization. Imagine an alien civilization is 15,000 light years away from Earth. And even if we try to communicate with them at the speed of light, it would take 30,000 years for a message to reach them and come back to us. An average human lives 70 to 80 years. So if we send a message to aliens today, the reply will come 30,000 years later. And would that reply even have any meaning 30,000 years from now?

Aliens Are Not Interested in Earth

According to this, aliens know about Earth. But they have no interest in us. That is why they do not come to us or simply ignore us.

We Are the First Civilization in the Galaxy

Meaning we are the most intelligent civilization in this universe. And before us, there was no advanced civilization in this universe at all. Which is why we cannot find aliens. And even if some civilization exists in some corner of the universe, it is far less developed than us.

Going Deeper: Government and Cosmic Isolation

Government Cover-Up

From here, things get a little darker. This idea says that governments and their secret agencies know about aliens. The government has solid evidence of alien existence. Or it could be that they have even made contact with aliens. And they have kept all of this hidden from ordinary citizens so that no unnecessary panic situation arises. Although I personally do not believe this theory.

We Are the Sentinels of the Milky Way

India has an island called North Sentinel Island. It is the only isolated island on Earth. The Indian government has banned travel to this island. Some tribes live on this island who know nothing about the outside world. There is no technology, nothing at all. The people who live on this island are still stuck in the Stone Age. In fact, if anyone comes from outside, they immediately attack with bows and arrows.

So what if? Our Earth is just like that island to this universe. The advanced civilizations of the universe have banned our Earth so that we can grow naturally — just like the Indian government. If that is the case, then we are thousands or millions of times more primitive compared to any alien civilization. And to us, they might be beings comparable to God.

Intelligent Life Is Rare

How many types of creatures live on Earth — some underground, some in water, some in the sky, some in forests. About 8.7 million species of animals live on Earth. But think about how many of them are intelligent. You might say that monkeys or dolphins are also intelligent. But if you compare them to humans, their intelligence is nothing compared to human intelligence. In simple terms, humans are the only intelligent beings on Earth. So maybe the same is true in space. Other planets may also have life, but they may not be intelligent. I am not saying there are no aliens. I am saying aliens do exist — but perhaps they are not as intelligent as humans. And that is why we have not found any alien to this day.

The Mid-Level Theories

We Are Living in a Simulated Universe

It is possible that what we consider reality is actually artificially created. Everything we feel is part of a large computer program. And this simulation may have been created by some highly advanced civilization. Our entire reality could be a computer program. And if that is true, do you know what the saddest part about it is? We will never be able to explore our real universe.

Interstellar Exploration Is a Uniquely Human Trait

Humans are very curious creatures. Since ancient times, we have had a deep desire to understand space. And it is because of this curiosity that we spend so much money on space exploration. If this interest did not exist, we would never have thought of going to the Moon or Mars — because no one is forcing us to go to space. Now imagine a different civilization living on some planet, but they have absolutely no interest in space. They have no desire to go to other planets and build colonies. It may be that this curiosity about space exists only in humans. Which is why we have not found any alien to this day.

The Rare Earth Hypothesis

The many types of life that exist on Earth today did not all appear overnight. A whole series of events happened one after another. Which is why we see so many types of species today. For example — Earth's position in the Goldilocks Zone, the presence of the Moon, the presence of water on Earth, Earth having its own magnetic field, evolution from single-cellular to multi-cellular organisms, and so on. If I start listing all the events, this would never end. So anyway — according to the Rare Earth Hypothesis, Earth is a very rare planet. Even if there is another planet like Earth somewhere in the universe, developing an intelligent civilization there would be extremely difficult. Because many events would need to happen one after another, just the way they did on Earth. If even one is missed or happens in the wrong order, the birth of an intelligent civilization there would become impossible.

Civilizations Don't Survive the Atomic Era

Some civilization developed just like ours. And during this development, they discovered nuclear power. Then conflicts arose among them. And because of these conflicts, that civilization used nuclear power. Which caused that civilization to be completely wiped out.

Interstellar Travel Is Scientifically Impossible

The nearest star to us is called Proxima Centauri, which is 4.24 light years away. So if we travel toward that star even at the speed of Voyager One — which is 17 kilometers per second — it would still take us about 73,000 years to get there. Let me remind you once again that the average human lifespan is 70 to 80 years. So if there is some civilization or planet 15,000 light years away, we can never reach there with our current technology. And even if someday in the future we can travel at the speed of light, it would still take us 15,000 years to reach that planet or that civilization. Meaning, unfortunately, even the speed of light is very slow in this universe. The fastest speed in the universe is the speed of light — and even that is extremely slow compared to the size of this universe. Yes, extremely slow.

Life Requires More Than One Habitable Planet

When any civilization gradually advances, it slowly depletes the resources of its planet. If a civilization is dependent on only one planet, then after that planet's resources run out, that civilization either collapses or its development stops. And since the entire civilization lives on only one planet, due to a cosmic hazard, that entire civilization could be completely wiped out.

Aliens Travel Through the Universe Virtually

In this case, aliens upload their consciousness digitally and travel through the universe virtually — the same way VR technology allows us to see a 360-degree simulation of a place without actually going there.

The Darkest Theories

Civilizations Don't Survive AI

When a civilization gradually advances, it develops artificial intelligence. And because of this AI, that civilization gets destroyed. A little while ago I mentioned the atomic era — which humanity did survive. Now the question is whether humans can survive the AI era. Only time will tell.

We Have Years to Reach the Great Filter

AI, nuclear war, asteroids, natural disasters, climate change, earthquakes — or any event that could end an entire civilization — this is called the Great Filter. And every planet and every civilization has to face the Great Filter at some point. According to this theory, we have not yet reached the time of our Great Filter. It could be that our Great Filter will be AI, or some pandemic, or an asteroid impact that will happen in the future. But it will happen for certain. When it will happen, only time can tell.

We Are Alone

Although our universe is so vast, life exists only on Earth. This idea is truly terrifying. It says we have not found aliens because there are no such things as aliens. Earth is alone. There is no other planet like Earth in this vast universe. If that is true, it is a truly frightening thing.

The Laboratory Hypothesis

This theory says that some advanced civilization is conducting research on us. Just as scientists on Earth research bacteria inside a lab in a controlled environment, some advanced civilization is observing us inside a lab. And we are inside their controlled lab environment.

We Are the Only Intelligence in the Entire Universe

Meaning we are the only intelligent civilization in this universe. I already mentioned this a little earlier, so I will not repeat it.

Civilizations Reset After a Certain Stage

This idea says that a civilization develops by using the resources of its planet and expands itself. Then, due to some Great Filter, the entire civilization collapses. But the entire population is not destroyed. Those who survive start developing again. But then again, due to some Great Filter, that civilization is destroyed again. If a civilization gets stuck in this loop, it can never become advanced enough to achieve interstellar travel. And this could also be a reason why we do not receive any alien signals. So we can only hope that our civilization does not get stuck in such a loop.

We Are Alone Because We Miraculously Passed the Great Filter

It may be that in the past, many types of civilizations lived in our universe. And among them, some civilizations became very advanced. But suddenly one day, something happened in space that wiped out all life in our universe. But fortunately, the living beings of Earth survived — which is why the entire cosmos lies dead, and only Earth has life. If that is truly the case, then we are really very lucky.

The Dark Forest Theory

Even within our Milky Way galaxy alone, there are billions of habitable planets. If even 1% of them had intelligent life, there should still be hundreds of thousands of planets with life — just within our Milky Way. But still, when we look at space, it appears dead and empty. And the solution to this is the Dark Forest Theory.

This theory says that our universe is like a dense and dark forest. Looking at such a forest from the outside, it may seem lifeless — but hidden throughout this dense forest are many predators. That is why no creature in this forest makes too much noise. Because if they make a loud noise, some large predator will come and finish them off. So everyone stays silent in this dense forest.

And it may be that the same thing is happening in our galaxy. There are many civilizations in our galaxy — that is true. But everyone is hiding. No one wants to reveal their position. Because if they reveal their location, some large and powerful civilization will come and destroy them. And in history too, we have seen and read what a powerful species does to a weaker one.

And this theory also says that we should not be searching for aliens either. Because it may be that the day we are waiting for — the day for which we are spending billions — the day we are so eager to see — the day the entire scientific community is waiting for — the day we first make contact with aliens — turns out to be the last day of humanity.

Final Thoughts

In this piece, I have presented a total of 23 theories. I do not know about all the theories, but most of them will certainly be proven true in the future. And although we still do not have solid evidence about aliens, personally I believe that aliens exist. Because in this vast universe, how could we possibly be the only ones? Tell me — do you believe in aliens?