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04:17 Performing Arts The physics of the "hardest move" in ballet Lesson duration 04:17 Manage Library 2,545,958 Views
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12:33 A shark-deterrent wetsuit (and it's not what you think) Lesson duration 12:33 Manage Library 405,964 Views
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04:21 Science & Technology Why certain wildfires are necessary Lesson duration 04:21 Manage Library 1,639,065 Views
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