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04:32 Social Studies The science behind the myth: Homer's "Odyssey" Lesson duration 04:32 2,855,234 Views
13:40 Science & Technology A brief (scientific) history of butts Lesson duration 13:40 2,834,957 Views
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05:55 Environmental Science Can 100% renewable energy power the world? Lesson duration 05:55 2,681,086 Views
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