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Biologists have discovered they can track hard-to-see species in streams, ponds and even the ocean by sampling the water for DNA. Scientists say the technique is an important conservation tool: So far, it's been used to track declining giant salamanders and even locate a rare whale.

Blue Jasmine finds the filmmaker stuck in old ruts; though his technique is as sound as ever, his worldview seems to have congealed decades ago. Cate Blanchett, Sally Hawkins and Alec Baldwin star in a story inspired by Bernie Madoff and Blanche DuBois.

Winter Morning Walks, an album featuring jazz composer Maria Schneider and soprano Dawn Upshaw, revolves around meditations on nature and beauty by former U.S. Poet Laureate Ted Kooser. All three artists have had battles with cancer — when, Schneider says, "everything in life becomes heightened."

Iranian envoys are to meet over the next two days with diplomats from the U.S., Russia, Britain, France, China and Germany. No one is expecting a breakthrough though in the long-running confrontation over Tehran's nuclear enrichment program.

More than 2 feet of snow hit the high plains this week, snarling travel and all but shutting down some cities. Despite those hassles, for farmers and ranchers, the snow brings some urgently needed moisture to their drought-stricken fields and pastures.

It's a brave new energy world, with two major opponents: natural gas and coal. As prices fluctuate and renewables, such as wind and solar, fight for a share of energy generation, there's heated competition for access to your wall socket.

The international donors group known as the "Friends of Syria" gathers in Istanbul Saturday, as aid experts warn of a ballooning disaster for millions of Syrians and neighboring states. With American non-lethal assistance increasing and pressure on the European Union to send weapons to rebel fighters, opposition leaders are faced with an embarrassing problem: the declared alliance between Islamist fighters and al-Qaida. Weekend Edition Saturday host Scott Simon speaks with NPR's Peter Kenyon in Istanbul.

Robert Siegel talks to Robert McFadden, senior vice president of The Soufan Group and a 30-year veteran of federal law enforcement, about the latest news in the Boston Marathon bombing investigation.

Researchers find that winning and losing NFL games not only causes fan to feel differently the day after the game but to eat differently as well. Fans of losing teams eat significantly more saturated fat after suffering defeats, while fans of winning teams eat lighter fare after victories.

Just when you thought the sports calendar couldn't get busier — the World Series, NFL regular season approaching half-way point, the NHL season underway — it can. Ahead of the new NBA season, which begins Tuesday, we'll look at a couple of valuable knees and a couple of legacies. Derrick Rose in Chicago and Russell Westbrook are both coming back from injury and surgery — and their performances could determine whether or not Miami wins a third straight title. Meanwhile, Lebron James tries to build his legacy, and Kobe Bryant tries to retain his.