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Health & MedicineCell-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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AnimalsWasp 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.
By Susan Milius -
Health & MedicineKill 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.