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WikiPedia: Grand_Canyon_của_Greenland http://edition.cnn.com/2013/08/29/world/europe/gre... http://news.discovery.com/earth/rocks-fossils/gree... http://www.nbcnews.com/science/grand-canyon-greenl... http://science.time.com/2013/08/30/scientists-disc... http://svs.gsfc.nasa.gov/goto?11354 //dx.doi.org/10.1126%2Fscience.1239794 http://www.telegraph.co.uk/news/worldnews/europe/g... http://tuoitre.vn/chinh-tri-xa-hoi/moi-truong/5665... https://web.archive.org/web/20160511221221/http://...