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Design, Engineering & Technology
How the world's longest underwater tunnel was built
lesson duration 05:38
3,280,476 views
5,164,352 views
628,725 views
1,223,227 views
369,915 views
1,457,470 views
Design, Engineering & Technology
NASA’s first software engineer: Margaret Hamilton
lesson duration 05:10
337,936 views
2,261,390 views
History
Spells, threats, and dragons: The secret messages of Viking runestones
lesson duration 04:35
661,942 views
615,760 views
3,442,788 views
367,058 views
4,481,769 views
2,114,512 views
930,550 views
441,886 views
3,446,772 views
Philosophy & Religion
I grew up in the Westboro Baptist Church. Here's why I left - Megan Phelps-Roper
lesson duration 15:18
6,568,376 views
5,595,895 views