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A small cylinder called Le Grand K has defined the kilogram for more than a hundred years. But if a scratch ever rendered it lighter, the definition of the kilo literally shifted. Time for a change.

Progress against malaria has stalled. Now a team is trying a new tactic.

Thousands of Massachusetts residents have been committed to treatment for addiction against their will. Some families say locking up addicts in prison isn't treatment. Others say it saves lives.

The French president set a goal of completing the work in five years. Hundreds of millions of dollars were raised toward the effort one day after a fire at the cathedral.

For children in developing countries, cancer care is largely out of reach. But new research is challenging assumptions that it's too costly and complicated.

Reentry programs work like a bridge between the world of corrections and the world of social services. Here's what one of those programs is doing to help folks stay out for good.

Frank Underwood is dead and his wife Claire is the country's first female president. Actor Robin Wright and showrunners Melissa James Gibson and Frank Pugliese talk about bringing the show to a close.

David Greene talks to retired Admiral James Stavridis, former supreme allied commander for NATO, about the potential consequences of the president's plan to withdraw U.S. forces from Syria.

Steve Inskeep talks to Democratic Rep. Scott Peters of California, a member of the House Committee on the Budget, about what the Trump administration calls a "tough" budget for the 2020 fiscal year.

French film director Agnès Varda was a pioneer during the new-wave arts revolution of the 1950s and '60s. She kept making important films for the next five decades.