The eastern Grand Canyon was about half-carved (to the level of the red cliffs above the hiker) from 15 million to 25 million years ago, an analysis published Sunday suggests. But the inner gorge was likely scooped out by the Colorado River in just the past 6 million years. Laura Crossey/University of New Mexico hide caption

toggle caption Laura Crossey/University of New Mexico

Science

Grand Canyon May Be Older (And Younger) Than You Think

About 6 million years ago, a new mineral analysis suggests, a mighty river zigzagging across the Colorado plateau may have found its way into older gorges, greatly enlarging them to create the West's most spectacular canyon. Still, some geologists aren't sold.

Outgoing Federal Reserve Chairman Ben Bernanke spoke about the Federal Reserve's first and next century on Thursday at the Brookings Institution in Washington. Manuel Balce Ceneta/AP hide caption

toggle caption Manuel Balce Ceneta/AP

Economy

Bernanke's Fed Legacy: A Tenure Full Of Tough Decisions

Federal Reserve Chairman Ben Bernanke will preside over his last Fed policy-making meeting on Tuesday and Wednesday. During his two terms as chairman, he faced a global financial crisis that threatened to become financial Armageddon, followed by a deep recession.

Amanda Gerety, a staff nurse at Boston Medical Center, checks monitors that track patients' vital signs. Fewer beeps means crisis warnings are easier to hear, she says. Richard Knox/NPR hide caption

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Shots - Health News

Silencing Many Hospital Alarms Leads To Better Health Care

Alarms are good and necessary things in hospital care — except when there are so many that caregivers miss signals of a patient in crisis. Trying to conquer "alarm fatigue," one hospital turned off the beeps — and found that patient care actually improved.

An Unending Repentance Christian Scott
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With new construction in the background, President Obama spoke about manufacturing and jobs during a visit to Intel's Ocotillo facility, Jan. 25, 2012, in Chandler, Ariz. Ross D. Franklin/AP hide caption

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As PC Sales Drop, Intel Delays A Plant Opening And Cuts Jobs

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Legacy Of Forced March Still Haunts Navajo Nation

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Flying Free Andrew Vasquez
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Macrame Tristeza
Memphis Emphasis Tristeza

Amanda Gerety, a staff nurse at Boston Medical Center, checks monitors that track patients' vital signs. Fewer beeps means crisis warnings are easier to hear, she says. Richard Knox/NPR hide caption

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Silencing Many Hospital Alarms Leads To Better Health Care

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Alice Snyder, with her parents Mary and Ryan, during a checkup with Dr. John Herzenberg, who treated her clubfoot without surgery. Jenny Gold/Kaiser Health News hide caption

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How Parents And The Internet Transformed Clubfoot Treatment

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To the Unknown Omer Klein
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One for the Road Omer Klein
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Prayer (for the earth) Rudy Royston
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Outgoing Federal Reserve Chairman Ben Bernanke spoke about the Federal Reserve's first and next century on Thursday at the Brookings Institution in Washington. Manuel Balce Ceneta/AP hide caption

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Bernanke's Fed Legacy: A Tenure Full Of Tough Decisions

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Memo Ambrose Akinmusire
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The eastern Grand Canyon was about half-carved (to the level of the red cliffs above the hiker) from 15 million to 25 million years ago, an analysis published Sunday suggests. But the inner gorge was likely scooped out by the Colorado River in just the past 6 million years. Laura Crossey/University of New Mexico hide caption

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Grand Canyon May Be Older (And Younger) Than You Think

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Triple Divide David "Goody" Goodrich
Dust of Many Horses Part 2 David "Goody" Goodrich
Hiwar Hijaz
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Daft Punk won the Grammy for Album of the Year for Random Access Memories and for Record of the Year for "Get Lucky." Frederic J. Brown/AFP/Getty Images hide caption

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Daft Punk, Lorde And Macklemore Win Major Grammy Awards

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Beyond Daft Punk
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