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04:32 Design, Engineering & Technology Is it possible to create a perfect vacuum? Lesson duration 04:32 Manage Library 1,085,827 Views
05:49 Physical Science Could we create dark matter? Lesson duration 05:49 Manage Library 1,401,424 Views
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05:31 Engineering Why don't perpetual motion machines ever work? Lesson duration 05:31 Manage Library 16,300,549 Views
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05:06 Earth and Space Science 3 Planets That Shouldn't Exist Lesson duration 05:06 Manage Library 1,038,370 Views
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