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October 24, 2012 "One common property we see in animal groups from schooling fish to flocking birds to primate groups is that they effectively vote to decide where to go and what to do," says an evolutionary biologist. But like human leaders, successful animal leaders know they can't get too far ahead of their constituents.

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October 17, 2012 New research suggests that by the time an Alzheimer's patient is diagnosed, many key neurons are already dead. Neuroscientists say it's possible that several recent trials of drugs for Alzheimer's have failed because the drugs were given after symptoms had already started to appear.

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October 16, 2012 New research presented at the Society for Neuroscience meeting suggests that teens are not necessarily wired to be impulsive. Researchers are also learning more about why it's important to treat problems like depression in teens early.

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October 15, 2012 Scientists say new insights about how stress affects the brain could lead to new treatments for post-traumatic stress disorder, anxiety and depression.

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October 4, 2012 A few years ago, scientists discovered that the club drug ketamine worked as a quick and effective treatment for people depression who didn't respond to other treatments. New research goes further in explaining just how it works.

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September 24, 2012 The new drug reversed changes in blood vessels that usually lead kids with the rare genetic disease progeria to have heart attacks and strokes. Research on the toxic protein responsible for progeria is also changing scientists' understanding of how normal cells age.

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September 20, 2012 The drug, called arbaclofen, made people with Fragile X syndrome less likely to avoid social interactions, according to a newly published study. Researchers suspect it might do the same for people with autism.

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September 18, 2012 In a study, researchers found that among white kids and teens, higher BPA levels were associated with more than twice the risk of obesity. But higher BPA levels didn't affect childhood obesity risk for blacks and Hispanics.

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August 16, 2012 The Centers for Disease Control and Prevention made a sweeping testing recommendation official amid growing concern about the estimated 2 million baby boomers infected with the virus, which can cause cirrhosis and liver cancer.

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August 14, 2012 A study found that a third of the residents of Minamisoma had detectable levels of radiation. But another study said plant workers are at risk of psychological distress.

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August 14, 2012 A newly discovered disease that makes boa constrictors sick could help researchers figure out how some dangerous viruses in animals end up infecting people.

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August 7, 2012 Pfizer's research on an experimental drug that attacks plaques in the brain has been discontinued. But scientists say they're hopeful that new treatments that attack a specific protein in plaques will have better success.

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July 30, 2012 As BPA is phased out of some plastics, there are questions about the safety of other chemicals. A suit has been filed against Eastman, a company that makes a new BPA-free plastic called Tritan. Do other chemicals carry the same risks alleged for BPA?

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