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PBS NewsHour

Antarctic ice sheet past ‘point of no return’

6:51

A study released by NASA and others offers the most definitive evidence that parts of the ice sheet in West Antarctica are melting and the damage is irreversible. The collapse will take more than a century, and the melting will lead to rising sea levels. Judy Woodruff talks to Thomas Wagner of NASA, one of the team’s lead members, about the larger consequences of these projections.

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PBS NewsHour

State of the Union 2016

PBS NEWSHOUR offers live coverage of President Obama's speech and the Republican response.

0:20

PBS NewsHour

PBS NewsHour Weekend

Premieres Saturday, September 7, 2013 at 6 p.m. ET.

0:30

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