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  1. 19816

    I have to ask you to remove the subtitle “Dangerous Bridge” under the photograph of the exit ramp from the New Jamarat Bridge in Saudi Arabia. There has never been an accident on that ramp, and the bridge is now being overhauled to make it safer. Dirk HelbingDresden University of TechnologyDresden, Germany

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  2. Mushroom Boom: Hobby records show climate-change boost

    Mushrooms in England are starting to pop up earlier and staying around later than they used to, according to 55 years of amateur naturalists' records.

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  3. Chemistry

    That’s a Wrap: Polymer coatings fortify pancreas cells

    A technique that encapsulates cells in polymer might one day benefit people who receive pancreas-cell transplants for diabetes.