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03:32 Earth and Space Science Does aloe vera really treat a sunburn? Lesson duration 03:32 Manage Library 385,219 Views
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05:32 Social Studies How one scientist averted a national health crisis Lesson duration 05:32 Manage Library 1,901,668 Views
04:52 Science & Technology What would it be like to live on the moon? Lesson duration 04:52 Manage Library 488,540 Views
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08:43 Science & Technology Time: the history & future of everything Lesson duration 08:43 Manage Library 10,100,544 Views
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03:30 Design, Engineering & Technology How do touchscreens work? Lesson duration 03:30 Manage Library 1,107,389 Views
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