Alien megastructures would likely self-destruct before we spot them
Dyson spheres, a type of huge megastructure designed to capture the energy output of a star, would be a sign of an alien civilisation – if we can find one before they disappear
Dyson spheres, a type of huge megastructure designed to capture the energy output of a star, would be a sign of an alien civilisation – if we can find one before they disappear
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