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@novapbs1,567 videos20 yrs
20Kin 28d
7.03Min 28d
$7.4Kin 14d
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1:35Since published
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1:48How do we know the universe is expanding? #universe #space #hubble #science #how
2:20Responding on 9/11 #september11 #marines #pentagon #september11th #podcast
1:18AI is older than you think #turing #turingtest #ai #artificialintelligence #documentary
1:08Is there a center of the universe? #space #heliocentrism #geocentric #universe #cosmology
1:52How your immune system fights cancer #immunesystem #cancer #medicine #science #cells
