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05:42 Science & Technology How we think complex cells evolved Lesson duration 05:42 Manage Library 864,696 Views
06:03 History How one piece of legislation divided a nation Lesson duration 06:03 Manage Library 2,964,236 Views
05:44 Design, Engineering & Technology The sonic boom problem Lesson duration 05:44 Manage Library 5,018,937 Views
05:07 Growth & Development Why are some people left-handed? Lesson duration 05:07 Manage Library 10,385,101 Views
04:28 Biological Bases of Behavior How do dogs "see" with their noses? Lesson duration 04:28 Manage Library 2,267,859 Views
05:03 Design, Engineering & Technology How does your smartphone know your location? Lesson duration 05:03 Manage Library 856,982 Views
05:22 The Arts Why Shakespeare loved iambic pentameter Lesson duration 05:22 Manage Library 1,775,369 Views
04:51 Design, Engineering & Technology Why do buildings fall in earthquakes? Lesson duration 04:51 Manage Library 1,789,082 Views
03:59 Science & Technology Why the Arctic is climate change's canary in the coal mine Lesson duration 03:59 Manage Library 214,535 Views
03:46 Science & Technology What triggers a chemical reaction? Lesson duration 03:46 Manage Library 913,793 Views
04:07 Design, Engineering & Technology Could a blind eye regenerate? Lesson duration 04:07 Manage Library 336,647 Views
05:18 Health How spontaneous brain activity keeps you alive Lesson duration 05:18 Manage Library 366,571 Views
04:43 Life Sciences The evolution of the human eye Lesson duration 04:43 Manage Library 1,447,660 Views
05:45 Health The benefits of a good night's sleep Lesson duration 05:45 Manage Library 6,731,427 Views
05:39 Social Studies The Atlantic slave trade: What too few textbooks told you Lesson duration 05:39 Manage Library 11,486,586 Views
05:58 Social Studies The great conspiracy against Julius Caesar Lesson duration 05:58 Manage Library 9,078,647 Views
