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04:48 Social Studies The infamous overpopulation bet: Simon vs. Ehrlich Lesson duration 04:48 Manage Library 579,952 Views
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04:37 Health What would happen if everyone stopped eating meat tomorrow? Lesson duration 04:37 Manage Library 875,952 Views
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05:35 Social Studies How humanity got hooked on coffee Lesson duration 05:35 Manage Library 1,477,679 Views
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