>[!abstract] >"The concept of quiet and loud aliens is used in the modeling of hypotheses for the prevalence of extraterrestrial intelligence, particularly in the context of the [[Fermi Paradox]]. Hypothetical "loud" aliens expand their sphere of influence rapidly in a highly detectable way; hypothetical "quiet" aliens are hard or impossible to detect. A special type of loud alien civilizations are "grabby aliens" who also inhibit the development of other technological civilizations in their sphere of influence" ("Quiet and loud aliens", 2024). ## References - Quiet and loud aliens. (2024, December 31). In Wikipedia. https://en.wikipedia.org/w/index.php?title=Quiet_and_loud_aliens&oldid=1264837979 ## Related - [[Anthropic principle]] - [[Dark forest hypothesis]] - [[If loud aliens explain human earliness, quiet aliens are also rare]]