First Contact – der erste Kontakt mit Außerirdischen. Den stellen wir uns doch immer so vor: Wir empfangen ein Signal, entschlüsseln es, und stellen fest: Das müssen Aliens sein! Aber: Was haben wir denn möglichen außerirdischen Zivilisationen von uns selbst mitgeteilt? Welche Signale und Relikte können Aliens von der Erde empfangen? Und wie sinnvoll ist es überhaupt, Signale auf der Suche nach Aliens auszusenden? | Terra X
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