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1,541,976 views
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The incredible, bendable, twistable, expandable elephant trunk
lesson duration 05:10
253,090 views
1,568,788 views
1,317,404 views
520,273 views
513,638 views
Why are airplanes slower than they used to be?
lesson duration 04:59
2,312,900 views
332,745 views
577,341 views
2,252,614 views
3,680,482 views
397,812 views
441,067 views
Why good ideas get trapped in the valley of death— and how to rescue them
lesson duration 05:10
751,418 views
11,491,504 views
527,018 views
614,447 views
How do jetpacks work? And why don't we all have them?
lesson duration 05:03
277,721 views
Just add water: The garden insect that can turn into a plague
lesson duration 05:46
514,107 views
435,891 views
427,524 views