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09-25-2014, 05:47 AM
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Exploring the Universe: Crash Course Big History #2
 Exploring the Universe: Crash Course Big History #2 In which John Green, Hank Green, and Emily Graslie teach you about what happened in the Universe after the big bang. They'll teach you about cosmic background radiation, how a bunch of hydrogen... From:CrashCourse Views:301   Time:14:37More inEducation أكثر... ??????? ??????: Exploring the Universe: Crash Course Big History #2 || ??????: ahlam1399 || ??????: اسم منتداك
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