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The U.S. aims to reduce carbon dioxide emissions by 80 percent by 2050. Wind and solar power can help. But folks doing the math say other pricey, controversial technologies — such as burying carbon gas underground, and expanding nuclear power — are also likely to be part of a low-carbon future.

The polio outbreak in Syria has spread to four cities, and new cases are suspected each day. But U.N. agencies responsible for combating the outbreak can work only with the Syrian government. This limitation has hobbled vaccination efforts in rebel-held regions, where the virus was first detected.

Another tech boom has brought an influx of money and new residents to San Francisco, and people who have long called the city home are being evicted from their apartments. Tenants and community organizers are demanding that the city do something to stop residents from being pushed out.

Newly disclosed court opinions and statements from the Obama administration raise big questions about whether the National Security Agency's surveillance programs are too complicated for anyone to understand or oversee. Self-policing comes with big challenges. Is it possible to control the vast spy agency?

Long before becoming the head of the Catholic Church, Pope Francis worked some odd jobs. At a church in Rome over the weekend, the pope talked about sweeping floors, working in a chemical lab and teaching in high school. And at one time, he kicked troublemakers out of clubs.

The rise of factory jobs in Bangladesh has brought profound cultural changes to the country — and to the lives of two sisters who made the Planet Money T-shirt.

Robert Siegel and Melissa Block read emails from listeners about John Mayer's performance chat with guest host Ari Shapiro, and a listener's rebuke of a story about a 60-year-old Japanese man who was switched with another baby at birth.

During Seattle's 34-7 win over New Orleans, the home team's fans went wild. They stomped so hard that a nearby seismometer's needle moved. Meanwhile, the noise at CenturyLink Field was louder than a jet engine.

A South African diving team expecting to find only bodies three days after the vessel sunk instead located the ship's cook, Harrison Okene, alive.

The space agency has announced plans to grow turnips, basil and cress on the moon by 2015. The experiment could be good news for astronauts sick of their freeze-dried fare. But researchers say the real goal is to see if humans could one day live — and farm — on the moon.