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  1. Materials Science

    Now, an invisibility cloak you can see

    Physicists have developed a device that can hide objects in visible wavelengths.

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  2. Life

    A cougar in Connecticut

    Using DNA and trailside cameras, wildlife biologists retrace the 18-month, 2,000-mile journey of a young male cat.

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  3. Life

    Wasp has built-in Facebook

    An insect species with a tricky social life has a special facility for telling one bug's mug from another.

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  4. In ancient Southwest droughts, a warning of dry times to come

    Anything but lush, the U.S. Southwest has been especially parched lately. About a decade ago a cycle of droughts began; the latest one has dried much of the region to a degree that meteorologists expect only twice a century.