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Ruby Bridges: The child who defied a mob and desegregated her school
lesson duration 09:44
350,540 views
564,211 views
3,973,533 views
1,168,434 views
355,928 views
What happens to your body when you start exercising regularly
lesson duration 04:19
8,468,215 views
5,018,540 views
291,158 views
199,158 views
8,312,302 views
381,244 views
The environmental cost of free two-day shipping
lesson duration 05:37
1,318,053 views
506,214 views
256,427 views
2,398,190 views
121,459 views
759,438 views
6,466,935 views
344,987 views
38,118,639 views
181,239 views
175,831 views
4,277,094 views