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Scientists collect samples in a stream springing from the Rhone Glacier during a visit of the micro organism sample collection site of the Center for Changing Alpine and Polar Environments of the Ecole Polytechnique Federale de Lausanne (EPFL) in Obergoms, Switzerland, Thursday September 13, 2018. By collecting and analyzing micro organisms from some of the world's biggest glacier-fed streams in the upcoming years, the team of EPFL scientists aims to understand how the microbial life has adapted to extreme environments, additionally allowing to unravel some of the implications of vanishing glaciers as a result of climate change. (KEYSTONE/Valentin Flauraud)