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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.

The anti-apartheid hero has been a unifying force in South Africa, particularly for the ruling African National Congress. There's concern, however, that xenophobia, racism and political infighting may grow once the "father of the nation" dies.

Since the 1930s, Louisiana has steadily been losing land that protects it from hurricanes and other disasters. The government board charged with protecting New Orleans from flooding sued the oil and gas industry Wednesday, arguing they are responsible for a big part of the problem.

Also: the history of blurbs; Buzzfeed launches a book section.

Christopher Hopkins has a headache — and the data to prove it. He and other computer programmers are exploring ways to turn heaps of personal health stats into something shareable and easy on the eyes.

While there was a small increase in the number of people filing first-time claims for unemployment insurance, the rise was largely due to annual shutdowns for retooling at car plants. Meanwhile, orders for durable goods rose last month.

At issue is whether Pfc. Bradley Manning knowingly provided intelligence to enemies of the U.S. The aiding-the-enemy charge is punishable by life in prison.

Democrat Anthony Weiner's path to the New York City mayor's office got a lot more complicated Thursday, just two days after he asserted that new revelations of his lewd online conduct would not chase him from the race for his party's nomination.

The fishermen are out in all weather in Turkey's Bosphorus Strait. So there's no question that the fish is fresh, as area chefs carry on the tradition of the ancient Greeks, Romans and Ottomans in putting fish to the fire.

Army Ranger Justin Slaby's left hand was blown off by a faulty grenade in a training accident. After getting a prosthesis, he was encouraged by one of his doctors to try for a career in the FBI. What happened next landed Slaby and the FBI in court and tarnished the career of a high-ranking agent.