Topic: Technology|
02.16.2013
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|Duration 02:18:18
Topic: Science|
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Topic: Science|
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Topic: Science|
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Topic: Science|
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Topic: Science|
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Topic: Science|
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Topic: Science|
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Topic: Science|
11.06.2010
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|Duration 01:33:01
Topic: Science|
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Topic: Science|
11.06.2010
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|Duration 01:20:23
Topic: Science|
11.08.2009
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|Duration 01:22:48
Topic: Science|
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|Duration 00:28:58
Topic: Science|
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|Duration 01:20:52
Topic: Science|
11.08.2009
|25,042 views
|Duration 00:14:03
Topic: Environment|
11.07.2009
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|Duration 01:26:02