Hvis man vil have opmærksomhed, kan det hjælpe at vinke og råbe. Men hvis der er flere millioner lysår hen til dem, du vil have fat i, er det måske bedre at bruge en eksploderende stjerne.
En gruppe forskere fra University of Washington, SETI Institute, Yale University og Smith College i USA kommer nu med den teori, at supernovaer kan være et værktøj, som rumvæsner gør brug af i et forsøg på at få kontakt med andre ude i rummet.
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