Do Aliens Exist | Fermi Paradox

The question of whether aliens exist in our world has been a topic of discussion for many. There have been movies, conspiracy theories, and claims made by ordinary people about encounters with aliens. Some notable incidents include the recovery of non-human biologics near a crash site as reported by a former US intelligence official and the claim made by a former Israeli space security chief that aliens do exist. Additionally, there are historical accounts such as two young men claiming to have seen aliens in Nayagarh area in 1947.

The Mystery of the Disappearing Trashcans In 1950, a mystery emerged when many trashcans started disappearing from New York. This coincided with reports of people seeing flying saucers in the sky. A cartoon published by the New Yorker combined both stories, suggesting that these flying saucers were responsible for taking away the dustbins.

"Where are the other people in the world?" "Where are the other people in this vast universe?" This question asked by Fermi during a lunch discussion came to be known as Fermi Paradox. With an observable universe spanning 93 billion light-years and billions of galaxies and stars, it seems plausible that there could be aliens on another planet.

The Enigma of Missing Aliens Despite our immense universe with countless galaxies, stars, and planets, we have yet to find any evidence of extraterrestrial life. The absence of contact or proof is what defines Fermi Paradox - while there is a possibility that aliens exist somewhere out there among trillions upon trillions planets orbiting around billions upon billions stars across numerous galaxies within our expansive cosmos; their existence remains unconfirmed.

To have life on a planet, it needs to be in a Goldilocks zone - an area around a star that is at the right temperature. The Earth's distance from the Sun puts it in our solar system's Goldilocks zone. If the Earth was slightly closer or farther from the Sun, our oceans would either freeze or evaporate. However, being in the Goldilocks zone doesn't guarantee life on a planet.

"What's the probability of a planet having life?" A scientist calculated it. The Drake Equation, created by astronomer Frank Drake in 1961, calculates the possibility of intelligent alien civilizations in our galaxy. However, many variables remain unknown and cannot be accurately estimated. Despite this uncertainty, some scientists argue that it is highly unlikely for human civilization to be the only one with intelligent lifeforms due to factors such as the vast number of planets in the universe and Earth's unexpected discoveries of life.

The Great Filter Model One theory suggests that civilizations capable of communication with each other ultimately destroy themselves. Our civilization is not sustainable due to overconsumption of resources, and this applies to other alien civilizations as well. The Great Filter Model states that most civilizations are destroyed before they can contact others.

Challenges in Finding Alien Life "Chemical biosignatures" are used to search for signs of life on other planets, but it's possible that alien life may have different biosignatures than what we're looking for. There's also a possibility that our civilization is alone in the universe or living in a computer simulation created by an advanced civilization.