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85,618 Views
Why are airplanes slower than they used to be?
Lesson duration 04:59
2,329,619 Views
2,433,517 Views
44,041 Views
4,944,562 Views
146,468 Views
946,161 Views
Why good ideas get trapped in the valley of death— and how to rescue them
Lesson duration 05:10
758,742 Views
993,970 Views
1,022,805 Views
307,627 Views
1,446,492 Views
684,661 Views
What it's like to live on the International Space Station - Cady Coleman
Lesson duration 06:17
77,144 Views
1,318,382 Views
1,218,864 Views
432,174 Views
448,539 Views
What it takes to be racially literate - Priya Vulchi and Winona Guo
Lesson duration 12:23
142,508 Views
3,691,180 Views
413,150 Views
The incredible, bendable, twistable, expandable elephant trunk
Lesson duration 05:10
255,954 Views