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Design, Engineering & Technology
How the world's longest underwater tunnel was built
lesson duration 05:38
3,211,096 views
5,137,577 views
619,430 views
1,187,089 views
362,406 views
1,436,255 views
Design, Engineering & Technology
NASA’s first software engineer: Margaret Hamilton
lesson duration 05:10
331,312 views
2,221,593 views
History
Spells, threats, and dragons: The secret messages of Viking runestones
lesson duration 04:35
655,263 views
605,114 views
3,386,925 views
360,564 views
4,468,249 views
2,096,035 views
916,809 views
431,117 views
3,383,398 views
Philosophy & Religion
I grew up in the Westboro Baptist Church. Here's why I left - Megan Phelps-Roper
lesson duration 15:18
6,552,894 views
5,512,597 views
284,945 views
Literature & Language
Why should you read “Lord of the Flies” by William Golding?
lesson duration 04:48
2,971,182 views
Design, Engineering & Technology
Why doesn’t the Leaning Tower of Pisa fall over?
lesson duration 05:06
4,755,245 views
2,112,869 views