Stock Photo - Two analogue astronauts (scientists wearing space suits), Carmen Koehler (L) from Berlin, Germany, and Inigo Munoz Elorza of Spain (unseen), wear 45 kg heavy space suits as they talk to helpers about their first mission in the mars simulation Amadee-15 of the 'Oesterreichisches Weltraum Forum' (lit. Austrian Space Forum) on the Kaunertal Glacier, Austria, 03 August 2015. The researchers practice for a manned mission to Mars in a two-week field simulation on rough terrain. Photo: Matthias Roeder/dpa | usage worldwide. - Kaunertaler Gletscher/Austria

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