Youtube activity of "umair alvi" (@umairalvi7382) on "Kurzgesagt – In a Nutshell" channel.
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UCxp8yf5Avz7sNc4ei5LEzqA
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umair alvi
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@umairalvi7382
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"String Theory Explained – What is The True Nature of Reality?"
Comments by video
"Что такое темная материя и темная энергия?"