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05:07 Science & Technology When will the next ice age happen? Lesson duration 05:07 Manage Library 1,679,104 Views
05:20 Mathematics Can you solve the false positive riddle? Lesson duration 05:20 Manage Library 4,010,853 Views
04:10 Psychology Why you should read self-help books Lesson duration 04:10 Manage Library 203,879 Views
02:01 Social Studies The real history of Cinco de Mayo Lesson duration 02:01 Manage Library 173,398 Views
04:49 Science & Technology How does hibernation work? Lesson duration 04:49 Manage Library 1,516,486 Views
04:33 Science & Technology How to build a dark matter detector Lesson duration 04:33 Manage Library 326,928 Views
04:51 Science & Technology Which is stronger: Glue or tape? Lesson duration 04:51 Manage Library 13,724,483 Views
03:30 Design, Engineering & Technology How do touchscreens work? Lesson duration 03:30 Manage Library 1,107,561 Views
04:58 Social Studies How the world's first metro system was built Lesson duration 04:58 Manage Library 1,790,909 Views
04:57 Science & Technology Why are fish fish-shaped? Lesson duration 04:57 Manage Library 589,080 Views
04:47 Science & Technology The surprising reasons animals play dead Lesson duration 04:47 Manage Library 2,263,706 Views
04:38 Literature & Language The Cambodian myth of lightning, thunder, and rain Lesson duration 04:38 Manage Library 4,625,378 Views
05:21 History The rise and fall of the Byzantine Empire Lesson duration 05:21 Manage Library 5,954,970 Views
05:08 Psychology Stay in - or leave - a relationship? Lesson duration 05:08 Manage Library 3,233,397 Views