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Design, Engineering & Technology
The World's Roundest Object (and Why it Exists)
lesson duration 11:44
36,970,891 views
29,374,771 views
36,279,204 views
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Johann Sebastian Bach's Life (The 3-Minute Version)
lesson duration 03:07
130,073 views
958,070 views
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The oldest living things in the world
lesson duration 06:10
2,188,763 views
336,895 views
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