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03:35 Technology How did trains standardize time in the United States? Lesson duration 03:35 Manage Library 230,136 Views
03:52 Physical Science How polarity makes water behave strangely Lesson duration 03:52 Manage Library 1,093,284 Views
21:20 Sociology Our loss of wisdom - Barry Schwartz Lesson duration 21:20 Manage Library 87,636 Views
19:39 Earth and Space Science Earth's mass extinction - Peter Ward Lesson duration 19:39 Manage Library 55,955 Views
03:56 Life Sciences What if we could look inside human brains? Lesson duration 03:56 Manage Library 218,616 Views
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02:50 Literature In on a secret? That’s dramatic irony Lesson duration 02:50 Manage Library 1,721,732 Views
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03:51 Medical Conditions The coming neurological epidemic - Gregory Petsko Lesson duration 03:51 Manage Library 37,909 Views
03:56 Environmental Science Do the green thing - Andy Hobsbawm Lesson duration 03:56 Manage Library 31,798 Views
06:00 Writing/Composition Slowing down time (in writing & film) Lesson duration 06:00 Manage Library 217,152 Views
19:17 Civics Learning from past presidents - Doris Kearns Goodwin Lesson duration 19:17 Manage Library 72,703 Views
15:34 Anthropology Digging for humanity's origins - Louise Leakey Lesson duration 15:34 Manage Library 39,440 Views
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04:24 Physical Science Is light a particle or a wave? Lesson duration 04:24 Manage Library 1,631,100 Views
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03:47 Numbers & Operations How to defeat a dragon with math Lesson duration 03:47 Manage Library 4,492,154 Views
