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NPR, PBS, Science, The Nation, ...
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California Newsreel
Documentaries for social change
NPR
NY Times
PBS Frontline
Since 1983, FRONTLINE has served as American public television’s flagship public affairs series http://www.pbs.org/wgbh/pages/frontline/
Science
TED
The Nation
The State of Things (Frank Stasio)
UNC webcasts