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85,587 Views
Why are airplanes slower than they used to be?
Lesson duration 04:59
2,329,268 Views
2,432,484 Views
44,031 Views
4,937,462 Views
146,300 Views
945,543 Views
Why good ideas get trapped in the valley of death— and how to rescue them
Lesson duration 05:10
758,600 Views
993,392 Views
1,022,361 Views
307,339 Views
1,445,399 Views
684,275 Views
What it's like to live on the International Space Station - Cady Coleman
Lesson duration 06:17
77,118 Views
1,316,330 Views
1,217,015 Views
432,055 Views
448,314 Views
What it takes to be racially literate - Priya Vulchi and Winona Guo
Lesson duration 12:23
142,425 Views
3,690,133 Views
412,825 Views
The incredible, bendable, twistable, expandable elephant trunk
Lesson duration 05:10
255,870 Views
513,832 Views