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Design, Engineering & Technology
How the world's longest underwater tunnel was built
lesson duration 05:38
3,280,987 views
5,164,447 views
628,800 views
1,223,708 views
369,966 views
1,457,616 views
Design, Engineering & Technology
NASA’s first software engineer: Margaret Hamilton
lesson duration 05:10
337,981 views
2,261,669 views
History
Spells, threats, and dragons: The secret messages of Viking runestones
lesson duration 04:35
661,982 views
615,818 views
3,443,188 views
367,105 views
4,481,939 views
2,114,633 views
930,638 views
441,950 views
3,447,129 views
Philosophy & Religion
I grew up in the Westboro Baptist Church. Here's why I left - Megan Phelps-Roper
lesson duration 15:18
6,568,567 views