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06:26 History The rise and fall of the Berlin Wall Lesson duration 06:26 Manage Library 8,833,873 Views
05:07 History Who built Great Zimbabwe? And why? Lesson duration 05:07 Manage Library 1,115,826 Views
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05:10 Problem Solving The power of creative constraints Lesson duration 05:10 Manage Library 563,701 Views
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05:31 Engineering Why don't perpetual motion machines ever work? Lesson duration 05:31 Manage Library 16,300,204 Views
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04:33 History Who were the Vestal Virgins, and what was their job? Lesson duration 04:33 Manage Library 9,746,329 Views
04:43 Literature & Language The world’s most mysterious book Lesson duration 04:43 Manage Library 9,479,604 Views
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05:10 Literature Why should you read Tolstoy's "War and Peace"? Lesson duration 05:10 Manage Library 5,174,599 Views
05:06 History How did Dracula become the world's most famous vampire? Lesson duration 05:06 Manage Library 3,839,357 Views