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Science & Technology
Nature's fortress: How cacti keep water in and predators out
Lesson duration 04:20
534,003 Views
355,240 Views
1,497,458 Views
Social Studies
Ruby Bridges: The child who defied a mob and desegregated her school
Lesson duration 09:44
367,045 Views
1,546,103 Views
431,480 Views
155,343 Views
Science & Technology
Just add water: The garden insect that can turn into a plague
Lesson duration 05:46
520,263 Views
525,514 Views
2,153,051 Views
Design, Engineering & Technology
The surprisingly long history of electric cars
Lesson duration 05:20
444,455 Views
1,605,535 Views
426,570 Views
945,151 Views
3,883,374 Views
440,925 Views
314,166 Views
509,637 Views
843,190 Views
Science & Technology
The genes you don't get from your parents (but can't live without)
Lesson duration 05:03
1,636,079 Views
378,803 Views
624,085 Views
1,062,504 Views