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[1].
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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