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How do jetpacks work? And why don't we all have them?
lesson duration 05:03
277,642 views
Blood, concrete, and dynamite: Building the Hoover Dam
lesson duration 05:12
842,646 views
Yes, scientists are actually building an elevator to space
lesson duration 05:19
760,476 views
The surprisingly long history of electric cars
lesson duration 05:20
422,506 views
3,711,341 views
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4,787,756 views
1,316,909 views
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How one design flaw almost toppled a skyscraper
lesson duration 05:16
795,227 views
886,224 views
Why good ideas get trapped in the valley of death— and how to rescue them
lesson duration 05:10
751,235 views
397,244 views
367,592 views
The material that could change the world... for a third time
lesson duration 05:27
891,801 views
603,806 views