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04:17 Performing Arts The physics of the "hardest move" in ballet Lesson duration 04:17 Manage Library 2,540,649 Views
06:17 Earth and Space Science Three Ways to Destroy the Universe Lesson duration 06:17 Manage Library 27,509,356 Views
06:25 Earth and Space Science Carl Sagan on the Existence of Extraterrestrials Lesson duration 06:25 Manage Library 652,265 Views
05:06 Earth and Space Science 3 Planets That Shouldn't Exist Lesson duration 05:06 Manage Library 1,039,660 Views
05:31 Engineering Why don't perpetual motion machines ever work? Lesson duration 05:31 Manage Library 16,588,052 Views
05:38 Physical Science Will we ever be able to teleport? Lesson duration 05:38 Manage Library 3,150,582 Views
