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  1. Health & Medicine

    Cell-Phone Buzz: Contradictory studies heat up radiation question

    A new long-term animal study of cell-phone radiation suggests that emissions don't cause cancer, but studies by a second team hint that cell phones may cause damage in other ways.

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  2. Animals

    Wasp Painting: Do insects know each other’s faces?

    A researcher who dabbed tiny stripes on the faces and abdomens of paper wasps says that she's found the first evidence that the insects can recognize individuals by their markings.

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  3. Health & Medicine

    Kill or Be Killed: Tumor protein offs patrolling immune cells

    Many human cancers may evade surveillance by exploiting a protein normally found on certain immune cells.