Fermi Paradox: Where are all the aliens? - Introduction

The Fermi Paradox refers to the apparent ................... between the high probability of the existence of extraterrestrial civilizations in the universe and the lack of evidence or contact with such civilizations.

• contradiction

• peace

• consistency

• harmony

Named after physicist Enrico Fermi, who famously asked, "Where is everybody?" the paradox raises questions about why, given the huge number of potentially .................... planets, we haven't observed any signs of advanced alien civilizations.

• habitable

• intolerable

• unbearable

• inadequate

Various......................., such as the possibility of self-destruction, limitations of interstellar travel, or the rarity of conditions leading to intelligent life, have been proposed to address this paradox.

• hypotheses

• diseases

• facts

• hippopotamuses

The "Great Filter" is a concept related to the Fermi Paradox: it represents a hypothetical barrier that significantly reduces the .................. of a civilization advancing to the point of becoming technologically advanced and capable of interstellar communication or travel.

• probability

• disability

• audibility

• gullibility

The concept of the Great Filter helps us understand why, despite the seemingly high probability of extraterrestrial life, we haven't yet observed any .............. evidence of advanced civilizations.

• conclusive

• ambiguous

• questionable

• doubtful