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04:34 Public Health How we conquered the deadly smallpox virus Lesson duration 04:34 Manage Library 8,733,362 Views
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04:08 Performing Arts The science of stage fright (and how to overcome it) Lesson duration 04:08 Manage Library 1,551,264 Views
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03:45 Earth and Space Science Four ways to understand the Earth's age Lesson duration 03:45 Manage Library 660,877 Views
01:55 Linguistics Mysteries of vernacular: Bewilder Lesson duration 01:55 Manage Library 59,628 Views
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03:14 Social Studies Labor Day: Is it really a necessary holiday? Lesson duration 03:14 Manage Library 300,339 Views
05:39 Science & Technology 300 years of fossil fuels in 300 seconds Lesson duration 05:39 Manage Library 1,808,209 Views