National-academy-of-sciences
38:23
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Tour of the Academy
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Conclusion
692 0
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04:07
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Light and Chemistry
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03:00
04:18
08:39
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code_swarm - Python
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"Chemistry After Lessons
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Potassium in water 2009
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The Time Machine
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03:44
06:22
1:08:56
16:45
00:40
00:56
07:51
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How to mix oil and water
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24:42
02:49
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PCR Rap
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09:05
07:27
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27:46