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The Grand Canyon is seen from around 10,000 meters in Arizona on July 1, 2013. The Grand Canyon as we know it was formed between five and six million years ago, which is youthful in geological terms, but parts of it could be as old as 70 million years, scientists said on Sunday, Jan. 26. (AFP)
~宏浩翻譯引用~
資料來源：http://chinapost.com.tw/guidepost/photo/default.asp?id=4155&next=1
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