Stock Photo - Geologist Henrik Rother takes a sample of sand at the cliff coast of Glowe on Ruegen island, Germany, 26 January 2016. Geologists are to examine the sediment in darkened rooms of the sand laboratory at the University of Greifswald to determine its age and origin. Photo: STEFAN SAUER/dpa | usage worldwide. - Glowe/Germany

Stock Photo: Geologist Henrik Rother takes a sample of sand at the cliff coast of Glowe on Ruegen island, Germany, 26 January 2016. Geologists are to examine the sediment in.

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