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On Mars, Signs of a Wetter World

This week, researchers reported that they had evidence showing that periodically-appearing dark streaks on the sides of Martian hills (known as “recurring slope lineae,” or RSLs) were patches of moist soil. http://www.sciencefriday.com/segment/10/02/2015/on-mars-signs-of-a-wetter-world.html #Podcasts #FullPodcastAvailable

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