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German SummaryZahlreiche Touristen und viele Einheimische Bulgariens baden jedes Jahr im Schwarzen Meer. Doch nur sehr wenige wissen etwas über die geologische Vergangenheit dieses Meeres und die Artenvielfalt der Lebewesen im Wasser.
English SummaryNumerous tourists and many locals of Bulgaria bathe every year in the Black Sea. However, very few people know anything about the geological past of this sea and the biodiversity of its marine life.
