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Dyson spheres: astronomers report potential candidates for alien megastructures – here’s what to make of it

By Simon Goodwin, Professor of Theoretical Astrophysics, University of Sheffield

There are three ways to look for evidence of alien technological civilisations. One is to look out for deliberate attempts by them to communicate their existence, for example, through radio broadcasts. Another is to look for evidence of them visiting the Solar System. And a third option is to look for signs of large-scale…

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