Aestivation Hypothesis (Sandberg/Armstrong/Ćirković 2017)
concept
A serious theory says advanced alien civilizations are asleep, waiting billions of years for the universe to cool down.
Who they are
The Aestivation Hypothesis is a 2017 idea from Sandberg, Armstrong, and Cirkovic.
What they do
It proposes that advanced civilizations rationally go dormant until the universe gets much colder.
How it works
Because computation becomes vastly more efficient (about 10^30 times) at temperatures near absolute zero, per Landauer's principle, such civilizations would 'sleep' now and wake far in the future; so the universe isn't empty, just quiet.
Why it matters
It matters as a possible explanation for why we don't see aliens. The engine treats it as a reference framework that could be disproven by detecting a very high-energy advanced civilization active today.
The engine's record — word for word
Advanced civilizations rationally go dormant ('aestivate') until cosmic background temperature approaches absolute zero — Landauer's principle makes computation 10^30 times more efficient at low temperature. Universe is not empty; Apex civilizations are sleeping. Engine treatment: Layer 3 reference framework; falsifiable by detection of high-energy Type III civilization activity in present 'warm' era.
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