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   Sci-News.com   
   Recent images from NASAs MESSENGER spacecraft reveal small fault scarps on   
   Mercurys surface. These cliff-like landforms are small enough that   
   planetary scientists believe they must be geologically young, which means   
   the planet is still contracting ...   
   Recent tectonic activity on Mercury revealed by small thrust fault scarps :   
   Nature Geoscience : Nature ResearchNature   
   The Incredible Shrinking Mercury is Active After All | NASANASA   
      
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