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German Minister of Education and Research, Johanna Wanka (CDU, L) visits the international gene bank in a cave that has a continuous temperature of -18 degree Celsius in Longyearbyen on Spitsbergen, Norway, 08 April 2015. The Minister of Education and Research informs herself of the work of different research institutes on Spitsbergen in the Arctic Polar sea during a journey through the Arctic. Photo: JENS BUETTNER/dpa | usage worldwide (KEYSTONE/DPA/Jens Büttner)