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03:46 Science & Technology What triggers a chemical reaction? Lesson duration 03:46 Manage Library 850,273 Views
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05:18 Health How spontaneous brain activity keeps you alive Lesson duration 05:18 Manage Library 363,128 Views
04:43 Life Sciences The evolution of the human eye Lesson duration 04:43 Manage Library 1,414,497 Views
05:45 Health The benefits of a good night's sleep Lesson duration 05:45 Manage Library 6,481,958 Views
05:54 Earth and Space Science How to create cleaner coal Lesson duration 05:54 Manage Library 512,641 Views
05:23 Engineering The 2,400-year search for the atom Lesson duration 05:23 Manage Library 2,488,257 Views
04:01 Health What we know (and don't know) about Ebola Lesson duration 04:01 Manage Library 1,961,922 Views
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07:08 Earth and Space Science Could we stop an asteroid? Lesson duration 07:08 Manage Library 7,912,943 Views
04:43 Life Sciences How does cancer spread through the body? Lesson duration 04:43 Manage Library 1,961,110 Views