Mysterious mars - Earth’s older brother09/02/2013September 2, 2013Talk: Ulrich Köhler from the German Aerospace Centerhttps://p.dw.com/p/19aGNAdvertisement To learn more about the Red Planet, we talked to Ulrich Köhler, geologist from the German Aerospace Center. Mysterious mars - Earth’s older brotherTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video
