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03:46 Science & Technology What triggers a chemical reaction? Lesson duration 03:46 Manage Library 854,334 Views
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05:18 Health How spontaneous brain activity keeps you alive Lesson duration 05:18 Manage Library 363,303 Views
04:43 Life Sciences The evolution of the human eye Lesson duration 04:43 Manage Library 1,416,337 Views
05:45 Health The benefits of a good night's sleep Lesson duration 05:45 Manage Library 6,499,734 Views
05:39 Social Studies The Atlantic slave trade: What too few textbooks told you Lesson duration 05:39 Manage Library 11,109,143 Views
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04:34 Religion The pharaoh that wouldn't be forgotten Lesson duration 04:34 Manage Library 4,548,903 Views
05:54 Earth and Space Science How to create cleaner coal Lesson duration 05:54 Manage Library 513,027 Views
05:23 Engineering The 2,400-year search for the atom Lesson duration 05:23 Manage Library 2,494,290 Views
04:01 Health What we know (and don't know) about Ebola Lesson duration 04:01 Manage Library 1,962,828 Views
04:27 Anthropology The hidden worlds within natural history museums Lesson duration 04:27 Manage Library 257,323 Views
04:05 Nutrition What are those floaty things in your eye? Lesson duration 04:05 Manage Library 22,140,907 Views
04:43 Life Sciences How does cancer spread through the body? Lesson duration 04:43 Manage Library 1,962,418 Views
04:46 Geometry The mighty mathematics of the lever Lesson duration 04:46 Manage Library 1,151,058 Views