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Science & Technology
Nature's fortress: How cacti keep water in and predators out
Lesson duration 04:20
533,889 Views
355,162 Views
1,497,345 Views
Social Studies
Ruby Bridges: The child who defied a mob and desegregated her school
Lesson duration 09:44
366,962 Views
1,545,555 Views
431,453 Views
155,323 Views
Science & Technology
Just add water: The garden insect that can turn into a plague
Lesson duration 05:46
520,189 Views
525,453 Views
2,152,413 Views
Design, Engineering & Technology
The surprisingly long history of electric cars
Lesson duration 05:20
444,190 Views
1,605,458 Views
426,542 Views
944,343 Views
3,881,164 Views
440,876 Views
314,141 Views
509,600 Views
843,003 Views
Science & Technology
The genes you don't get from your parents (but can't live without)
Lesson duration 05:03
1,635,979 Views
378,659 Views
623,986 Views
1,062,275 Views