Youtube activity of "Donald MacKerer" (@donaldmackerer9032) on "Space Matters" channel.
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UCaIq9QBEzA-MdCVMbB-f_JA
Commenter youtube id
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Donald MacKerer
Commenter name
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@donaldmackerer9032
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"Fermi Paradox: Why don't we see signs of alien civilizations?"
Comments by video
"The Final Real Images Of Venus - What Have We Found?"