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Shavings of metal can flake off of the artificial joints and cause serious pain and medical problems in the hip. About a half-million Americans have this type of implant, and though most patients won't have a problem, one doctor called the failure rate "unacceptably high."

The latest session made history on several fronts, and accepted cases for next year that will likely make still more. This year the liberals won a lot — but that doesn't mean they will in the future.

The Millennium Development Goals, set in 2000, revolutionized the fight against poverty. Now the world is setting Sustainable Development Goals. But critics say there may be too many priorities.

Late Show host David Letterman said goodbye Wednesday night with his trademark self-deprecating sarcasm. He left as he had arrived: with a hilarious show made on his own terms.

As the 10th anniversary of the hurricane's landfall approaches, art museums across New Orleans focus on how the city sees itself today. In other words, no ruins and no people trapped on roofs.

Renee Montagne talks with Dion Nissenbaum, whose book tells the stories of Israeli and Palestinian families on Assael Street, a political and religious fault line in Jerusalem since 1948.

As Congress attempts to rewrite the much-maligned federal education law, it's worth exploring its successes and shortcomings in fixing broken schools.

In important Super Tuesday states with a high number of born-again voters, Ted Cruz is losing to Donald Trump, and Marco Rubio is eating into his support with evangelicals.

Iowa and New Hampshire have spoken, each in its own unique accent. Now the race moves on to Nevada and South Carolina, states quite different from the first two, and quite different from each other.

Republican establishment choice Jeb Bush was once the candidate to beat. No more: The success of Ted Cruz, Donald Trump and Marco Rubio in the Iowa caucuses puts new pressure on the party mainstream.