Der Angriff eines räuberischen Tintenfischs, schwere Verletzungen am Kopf und Auge, der verzweifelte Kampf ums Überleben – all das liest Privatdozentin Dr. Brigitte Schoenemann aus den Überresten eines Tieres. Vor 465 Millionen Jahren versteinert der Trilobit, den die Kölner Biologin vom vom Zoologischen Institut und Institut für Biologiedidaktik nun untersuchte. Minuziös wie eine Gerichtspathologin analysierte sie die Verletzungen, aus denen sie ein entscheidendes Ereignis im Lebenslauf des Trilobiten, eines ausgestorbenen Verwandten der heutigen Krebse und Insekten, rekonstruieren konnte. Aus der Tatsache, dass das Tier überlebte, folgert sie, dass Tiere bereits im Paläozoikum über ein gut funktionierendes Immunsystem verfügt haben.
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