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09-18-2014, 12:23 PM
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The Big Bang: Crash Course Big History #1
 The Big Bang: Crash Course Big History #1 In which John Green, Hank Green, and Emily Graslie teach you about, well, everything. Big History is the History of everything. We're going to start with the Big Bang, take you right through... From:CrashCourse Views:77756   Time:14:25More inEducation أكثر... ??????? ??????: The Big Bang: Crash Course Big History #1 || ??????: ahlam1399 || ??????: اسم منتداك
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العرض الشجري