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  1. Life

    Drug candidate takes new aim at MERS

    An experimental drug that shuts down construction of virus-making factories could become a new weapon against MERS.

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  2. Astronomy

    Feedback

    Readers discuss the speed of spinning particles, what defines a planet and how to see invisible shrimp.

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  3. Health & Medicine

    Your brain on marijuana: two views

    Many of the “facts” that people believe to be true about marijuana are not supported by science, and while the pro-pot lobby cherry-picks data to support its arguments (denying marijuana’s addictiveness, for example), so too do anti-marijuana groups, which play up pot’s dangers.

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  4. Life

    Designer T cells emerge as weapons against disease

    Decades of attempts to boost the immune system’s ability to fight disease are finally starting to pay off. Reprogrammed T cells serve as new weapons against cancer and autoimmune diseases.

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  5. Neuroscience

    Legalization trend forces review of marijuana’s dangers

    Marijuana legalization advocates tout pot’s medicinal benefits and low addictiveness, while critics point to its neurological dangers. Research shows that the reality is somewhere in the middle.

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  6. Astronomy

    Young, hot exoplanet takes title for longest year

    Newly discovered exoplanet sits a whopping 2,000 times farther from its star than Earth does from the sun.

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  7. Tech

    Lasers heal damaged rodent teeth

    Handheld laser spurs stem cells into action, regrowing dentin in drilled teeth.

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  8. Archaeology

    First pants worn by horse riders 3,000 years ago

    A new study indicates horse-riding Asians wove and wore wool trousers by around 3,000 years ago.

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  9. Life

    Polio could return after near eradication

    Polio was considered eliminated in the United States by 1979, but since then vaccination rates have slipped, prompting concerns about reemergence.

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  10. Animals

    Reef fish get riled when intruders glow red

    A male fairy wrasse gets feisty when he can see a rival’s colorful fluorescent patches.

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  11. Environment

    Carbon dioxide levels hit landmark in Northern Hemisphere

    The Northern Hemisphere experienced the first full month with the greenhouse gas at or above the symbolic 400 parts per million level.

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  12. Climate

    Violent storms may shatter sea ice

    Tall waves’ effect on sea ice hints at troubled water in the future.

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