Why Did The Fermi Paradox Exist?

The Fermi paradox is the apparent contradiction between the high probability of and the lack of contact with extraterrestrial civilizations. The paradox is often misinterpreted, suggesting that if intelligent life existed, we would see evidence of its visits to Earth, and since we do not, such life does not exist. Though Enrico Fermi did question the apparent absence of extraterrestrial life, he did not publish any material on the subject suggesting that the absence is paradoxical. The paradox was introduced shortly after Fermi’s death, first in a paper published by Michael Hart. Though it is frequently cited as such, the Fermi paradox is not positive evidence that extraterrestrial life does not exist, and should not discourage the search for extraterrestrial intelligence.

The Fermi Paradox
A paradox is a statement leading to a conclusion that seems logically unacceptable or self-contradictory, despite sound reasoning based upon acceptable premises. The Fermi paradox is the contradiction between the estimated high probability of other intelligent extraterrestrial civilizations and the lack of evidence for the existence of such civilizations. The paradox is attributed to Enrico Fermi, as he rose the question “Where is everybody?” during a discussion with colleagues about the possibility of superluminal travel.
The principle of mediocrity contends that our biological and technological evolution, as well as our planet and solar system, are not unique, but are rather common throughout the universe. Additionally, the age of the universe is estimated to be 13.8 billion light-years old, and presently, it is estimated that the diameter of the observable universe may be 92 billion light-years. If the universe is flat (as predicted, with a 0.4 percent margin of error), its size may be actually be