Photo de stock - 29 May 2019, Baden-Wuerttemberg, Hagnau: Scientists and researchers are preparing a drilling platform on Lake Constance between Hagnau and Constance that will be used to investigate the sediment of Lake Constance. Photo: Felix Kästle/dpa. - Hagnau/Baden-Wuerttemberg/Germany

Photo de stock: 29 May 2019, Baden-Wuerttemberg, Hagnau: Scientists and researchers are preparing a drilling platform on Lake Constance between Hagnau and Constance that will.

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