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420,150 views
833,796 views
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Science & Technology
The genes you don't get from your parents (but can't live without)
lesson duration 05:03
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355,651 views
604,385 views
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Mathematics
Can you solve the rogue submarine riddle? Difficulty level: Master
lesson duration 06:19
1,028,069 views
1,361,584 views
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Psychology
2 questions to uncover your passion — and turn it into a career - Noeline Kirabo
lesson duration 11:07
214,928 views
679,199 views
514,244 views
Sex Education
How porn changes the way teens think about sex - Emily F. Rothman
lesson duration 15:13
592,320 views
3,048,374 views
536,653 views
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