Was ist die Rare Earth-Hypothese?

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Overview:

Title: Was ist die Rare Earth-Hypothese?
Author: Patrick Achenbach
Year: 2001
Type: Essays
Series: Frage und Antwort (Perry Rhodan Journal)

Editions/Publications:

2001 . Perry Rhodan, #2054: Die Höhlen von Ertrus (2001, Patrick Achenbach, Pabel-Moewig, DM 3.00, 72+xii pages, digest, MAGAZINE)