Do Aliens Exist?

Aliens are controlling politics from the background, and they want to conquer earth!!
Honestly, that would be an interesting plot for a Marvel movie, but genuinely, do Aliens exist? and did they visit Earth?

Let's start from what reignited the conversation in the first place.

Not long ago, alien debate was a heated topic, after a testimony in front of the US congress stating that the military has in hold "Non-Human Biologics", and a presentation of alien mummies in the Mexican congress. Today, the topic is mentioned again following Obama Disclosure, and Trump's tweet. These events brought the question back to the surface and naturally raised curiosity again. So, let's explore this together.

Before getting into the arguments, I want to share where my curiosity comes from. Since childhood, I was always fascinated by the skies, the stars and space. Movies and cartoons have vividly captured my imagination, and I always started thinking about the possibility of an extraterrestrial life existing. My wild passion always used to think of a way to communicate with these supposed aliens, inspired by movies, books, and UFO hunting shows. Aliens and UFOs were but a small part of my genuine interest in space and the universe.

To get there, we first need to ground the discussion with a few basic concepts, because without them, we will be easily carried away with narratives that sound exciting, but don't survive physics.

We begin by exploring the vastness of the Universe. To measure the immense distances across the cosmos, astronomers use a unit called the light-year, which is defined as the distance light travels in a vacuum in one year. Light moves at about 300,000 km/s, and according to relativity, nothing with mass can reach that speed, only approach it.

Moreover, the observable universe is unimaginably vast, about 93 billion light-years in diameter and home to roughly 2 trillion galaxies. Our own Milky Way alone spans about 100,000 light-years and contains hundreds of billions of stars. Many of these stars likely have planets orbiting them. Even the closest star to Earth, Proxima Centauri, is 4.24 light-years away, a distance that would take tens of thousands of years to reach with our current technology. When you begin to grasp these scales, it becomes clear that there could be billions of potentially habitable worlds.

So mathematically, it is intuitive that a life must surely be out there. It almost feels impossible we are alone.

But there is an important distinction here. Alien life is plausible. Alien visitation is a separate claim, and it needs a completely different level of evidence.

For decades, humanity, equipped by very sophisticated wonder tools of engineering, such as the Hubble, James Webb telescope along with instruments like LIGO, have captured all types of information the universe can share with us, from EM radiation (light), gravitational waves, and particles, all originated from natural causes that are documented and studied (black holes, neutron stars, supernovae...). Yet, even after all this time, there is no evidence of the existence of an advanced, highly intelligent alien life or a remnant of one.

Any civilization that could reach Earth would have had to conquer the physics of interstellar travel, or the biology of time itself. Such a civilization would almost certainly leave detectable echoes across the universe, raising the question of why our most advanced instruments have found no clear evidence of their existence.

And, if they exist, it would mean they communicate in a way humans can't detect or understand, like how monkeys stay unaware of cellphone signals passing through their bodies. So, the question becomes: how can the universe be so statistically favorable to life, and still look so silent when we listen?

This inconsistency explored here, is a common conjecture that scientists are trying to solve, and it's called the Fermi paradox. It highlights the contradiction between the high probability of extraterrestrial life and the lack of evidence for it.

Once you take the distance barrier seriously, and then take the “silence” seriously, certain popular stories start to feel off.

It will be funny to think that a civilization that mastered intra dimensional traveling, conquered their biology, the universe, and solved physics as we know it, will travel all the way to earth, observe a primitive life form (humans) in their backyard, physically do patrols, and then crash on their surface.

Think about it for a moment, isn't it hilarious? It is indeed. Extraordinary claims require extraordinary evidence. While curiosity about alien life is scientifically justified, current evidence does not support the idea that aliens have visited Earth. Until verifiable proof emerges, the question remains open, and that mystery is part of what makes the universe so fascinating.