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Re:SETI spots dozens of new mysterious signals emanating fro... by amthewiz on Thursday September 13, 2018 @06:26PM (#17983240)
An advanced civilization, when looking to signal other potential civilizations, would hopefully -

- use the lowest common denominator long range communication medium (like EM waves), not the most advanced technology available to them, and

- would broadcast it widely in spatial, temporal and spectral dimensions and not worry about efficiency

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