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Reporting in Science, researchers write that mouse stem cells can be transformed not only into egg cells--but into newborn pups. Sean Morrison, a stem cell expert at the University of Texas Southwestern, explains the stem cell's journey, and what it could mean for fertility and assisted reproduction.

The organization also apologized to Canada for the "egregious" actions of one of its athletes.

Britain's High Court ruled that five terror suspects, including radical preacher Abu Hamza, can be extradited immediately to the United States. The five suspects have fought for years to avoid facing charges in the U.S.

The FBI says there are strong preliminary indications that the killing of a Border Patrol agent earlier this week was accidental. Melissa Block talks with NPR's Ted Robbins about the ongoing investigation of the shooting along the Arizona-Mexico border.

All the news we couldn't fit anywhere else.

During the financial crisis, gold prices hit record highs as people looked for somewhere safe to park their money. In West Africa, that's had a devastating, deadly effect on children.

Cairo's Tahrir Square was the focal point of the 18-day uprising that ousted President Hosni Mubarak last year. During recent renovations, a large mural depicting the struggle was whitewashed — only to be repainted by supporters. Now, Egyptians are at odds over how to memorialize the events.

Mark Helprin's sweeping midcentury novel, In Sunlight and In Shadow, describes a postwar New York in limbo. Helprin borrowed from his own experiences to write this tale of love and familial obligations. "It's all based on what I know and what I knew," he says.

Over the past four decades, Benoit Rolland has made more than 1,400 bows for violins, violas and cellos.

Friday, the MLB debuted its new playoff format: Two wild-card teams from each league played in a high-stakes, single-shot game to advance to the full playoffs. The Baltimore Orioles defeated the Texas Rangers, and the St. Louis Cardinals beat the Atlanta Braves. NPR's Tom Goldman speaks with host Scott Simon about those games and the Rockets' Royce White, who plays in the NBA with a generalized anxiety disorder.