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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.

Hurricanes often weaken as they travel north across colder water and approach land. But Sandy hasn't.

Serge Haroche of France and David Wineland of the United States have been honored for their work on the interaction between life and matter — in particular, the "fundamental interactions between light particles and matter."

Tens of thousands of Cambodians gathered in Phnom Penh today to watch as the body of former King Norodom Sihanouk returned to the nation he dominated for more than half a century. He will lie in state for three months. Sihanouk died Monday in China.

After decades in the endangered species list, wolves will be hunted in those two states. The changed has stirred criticism and excitement.

For the first time, the Red Cross in Spain is looking to raise money so that it can get food to those who are suffering most because of the country's financial crisis. For decades, the organization has focused on helping starving people elsewhere.

Growing up in 1960s Nebraska, Linda Hernandez and her sister were among the few Latino students in town. When it was time to take the SAT, their guidance counselor told them not to bother. She told them that "all we would do is have babies," Linda says.

Homeland Security Secretary Janet Napolitano said that as the across-the-board cuts take shape, TSA will have to leave vacancies open and cut overtime.

Uhuru Kenyatta is facing charges at the International Criminal Court. A official announcement will be made Saturday morning.

Family and Friends celebrate the lives of Victoria, Daniel, Caroline and Charlotte, recalling how each of them could light up a room. The teacher and three students were killed in the school shooting in Newtown on Friday.