Everyone feels something when they look up at the sky on a starry night. Whether you are overwhelmed by the beauty of the stars, fail to comprehend the scale of the universe or have a existential meltdown. Everyone feels something. Enrico Fermi had a feeling too. “Where is everybody?” The Fermi paradox, named after Enrico Fermi, is the conflict between the lack of evidence of extraterrestrial life and high probability of their existence. To put it simply, where are all the aliens? The basic idea of the paradox are: There exist billions of stars in the Milky Way. Many of which are similar to the Sun. There is a high probability some of these Sun-like stars have Earth-like planets surrounding them. Considering the age of the Milky Way intelligent life should have already developed. One of these civilizations could have developed interstellar travel. Even at the rate of currently envisioned interstellar travel, our galaxy could be completely explored in a few million years. Based on this logic, the Earth should have already been contacted by extraterrestrial life. However, the galaxies outside of our local group are forever out of reach for us because of the expansion of the universe. Even with really fast spaceships it would take billions of years to reach other galaxy groups because they are moving away from us with increasing speed. Therefore, lets focus on our local group or more specifically on the Milky Way galaxy. There is around 20 billion sun-like stars in the Milky Way. According to the PNAS estimate around a fifth of those sun-like stars have Earth-like planets. If just 0.1% of these planets developed life there would be over 1 million planets in the Milky Way with life. The Milky Way is around 13 billion years old but the first 1 to 2 billion years would not be a good place for life because things exploded a lot. After the first 1 to 2 billion years the first habitable planets were born. The Earth is only 4 billion years old so there probably have been trillions of chance for life to develop on other planets before us. However, outer space continues to be silent. SETI (Search for Extraterrestrial Intelligence) is an organization dedicated to listening for signals from other intelligent life. SETI hasn’t yet been able to pick up any kind of signal that could be a intelligent civilization trying to contact others. Let us create a hypothetical planet that is say 7 billion years old. This is within the possible timeframe of when a habitable planet could’ve been born in the Milky Way. If this planet followed a similar development path as Earth it would be over 2 billion years ahead of us in technology and advancement. That number is staggering. If we met a civilization only 1,000 years ahead of us it would be like if a medieval person saw our civilization. If this civilization was 1 million years ahead of us it might be as incomprehensible to us as human culture is to monkeys. Our hypothetical planet is over 2 billion years ahead of us. In other words, over 2 thousand million years ahead of us! Remember our hypothetical planet is over 2 billion years ahead of us. A civilization on our hypothetical planet should have reached type 3 level. A type 3 civilization should have mastered interstellar travel and colonized the entire galaxy by now. Given the power of such a civilization, their presence would easily be noticeable. But till this day we have seen nothing, heard nothing, and we have been visited by a grand total of zero aliens. So where is everybody? We do not have an answer to the Fermi Paradox but scientists have proposed multiple explanations. The explanations often fall into 2 groups. One side assumes there is no sign of these advanced civilizations because there are none out there. This side cites the math as an explanation. Based on the math thousands of them should exist just in our own galaxy but none have made contact with us. They believe in the existence of a great filter. This theory says that on the path to a type 3 civilization all or nearly all life hits a wall that is extremely unlikely or impossible for life to get beyond. We could be rare and have already passed the great filter or the great filter lies ahead. The other side believes there are intelligent species out there and there are logical reasons why we haven’t heard anything. This could be because super-intelligent civilizations already have already visited Earth before we were here, the galaxy has been colonized already but we live in some desolate rural area of the galaxy, there plenty of communication out there but our technology is too primitive to hear it. There exists many more possible explanations for the Fermi Paradox, those were just a few. In conclusion, the existence of aliens is a paradox, all the numbers say there should be super intelligent aliens out there but so far, nothing. The Fermi Paradox brings out a deep humbling for us humans. On Earth, we are the kings ruling over a small little world. Within this bubble it is rare that we are ever confronted with the concept of being a dramatically inferior species to anyone. But the possible existence of type 2 and type 3 civilizations make us seem like nothing more than ants on the universe’s tree of life. Just maybe, the universe isn’t as silent as it seems.