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University of New Hampshire professor Yitang Zhang announced this week that he has come close to solving a centuries-old problem: proving the twin prime conjecture. Host Scott Simon gets an explanation from Weekend Edition Math Guy Keith Devlin of Stanford University.

The Supreme Court justice and noted Yankees fan showed her baseball acumen Wednesday while presiding over a re-enactment of the 1972 case that challenged the sport's antitrust exemption.

In a major speech, the president rejects the idea that the country can fight an opened-ended "global war on terror." In setting his own guidelines, he defines the standards for using drone strikes and again calls for closing the Guantanamo Bay prison.

After Oprah Winfrey's friend and health adviser learned that 90 percent of the food on Maui is flown or shipped in from outside, he convinced her to turn a portion of her estate on the island into a farm. Winfrey is giving away the food she's now growing on 16 acres of land, but it may soon be for sale.

The revival is partly based on the humble sour fruit's growing reputation as a superfood. And in Michigan, a scientist is on a quest to introduce a whole new world of hardier, tastier tart cherries by breeding American trees with ancestral varieties from Eastern Europe.

The partisan war over judicial nominees has accelerated in recent years. It took nearly a year to win Senate confirmation for Sri Srinivasan to the important federal appeals court for the District of Columbia, though he had no formal opposition.

Lois Lerner has been at the center of a scandal over the tax agency's targeting of conservative groups.

There were hugs and tears, smiles and laughter on Thursday, as students and teachers from Plaza Towers Elementary School, destroyed in Monday's tornado in Moore, Okla., reunited. The school district reopened all of its schools just for the day on what would have been the final day of classes before summer vacation.

Members of the Boy Scouts of America voted on Thursday to allow gay members.

Two mothers whose sons were killed during the first Gulf War talk about how they became friends after their sons died. The past 22 years would have been tough without the friendship, because, as one tells the other, "what's in our hearts we share."