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how many books can we read in our lifetime?كارل ساغان كم كتاب نستطيع ان نقرأ خلال حياتنا؟,Education,carl sagan cosmos,science,books,knowledge brain capacity bits,memory,يوجد ترجمة عربية A clip from Carl Sagan's cosmos episode 11 the persistence of memory, showing how many books we can read in our life time.
карл саган,книги,песочница,видео,video
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