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Although Mars is considered humanity's great hope for colonizing another planet, Earth's outer neighbor is far from being fully explored. For this reason, probes and robots have been sent to the red planet for decades, including "Perseverance," NASA's fifth Mars rover mission. Scientist and astronaut Ulrich Walter explains why Mars is once again the focus of space travel and why the moon could serve as a starting point. ???? More SPACETIME episodes • SPACETIME documentary series with Prof. Dr. Ul... ???????????? SPACE TRAVEL documentaries • DOCUMENTARIES: Space travel ???? More documentaries & reports http://bit.ly/WELTdokus ???? Subscribe to the WELT YouTube channel http://bit.ly/WeltVideoTVabo #Spacetime #Mars #Doku