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The sun sets just before midnight, lighting up the settlement houses, at the Kings Bay research station on Spitsbergen in Ny-Aelesund, Norway, 09 April 2015. Scientists with the Alfred Wegener Institute work with the French polar institute Paul Emile Victor (IPEV) in the fields of biological, geological, and meteorological research at the AWIPEV German-French arctic research base. Photo: Jens Buettner | usage worldwide (KEYSTONE/DPA/Jens Büttner)