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Matthias Maurer - Ein Astronaut taucht unter
Der Astronaut als Aquanaut: In seiner Ausbildung war Matthias Maurer viel unter Wasser. Uns hat er erzählt, warum, wo er am liebsten hinfliegen möchte und welche Raumfahrt-Missionen für ernsthafte Raumfahrer nicht in Frage kommen.