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A glacier in Patagonia, Argentina, calves, with a sudden collapse of ice. Researchers say that the activity that precedes these types of tipping points and the triggers that cause them may follow predictable patterns. Philip Stanley Dickson/iStockphoto.com hide caption

toggle caption Philip Stanley Dickson/iStockphoto.com

Science

Predicting The Crash: Tracking Tipping Points

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Vicki and Tom Apsey speak to their son, Marine Lance Cpl. Josh Apsey, who is serving in southern Afghanistan. Catherine Welch for NPR hide caption

toggle caption Catherine Welch for NPR

'America's Battalion' In Afghanistan

Marine's Family Awaits Word From The War ZoneHQR News

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Richard M. Burr (R-NC), surrounded by copies of a proposed bill, during the first day of the Senate Health, Education, Labor and Pensions markup of comprehensive health care legislation. Scott J. Ferrell/Congressional Quarterly/Getty Images hide caption

toggle caption Scott J. Ferrell/Congressional Quarterly/Getty Images

Health Care

There's No Market For GOP Health Care Bills

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