Do cell phones increase your risk of cancer.  The latest research from the National Toxicology Program of the National Institutes of Health is less than conclusive, but investigative reporter Mark Hertsgaard of The Nation says, newly released details are more ominous than earlier releases had indicated.  For some cancers, there was what is called “some evidence” of possible linkage, while for at least one cancer..Schwannoma, the evidence in rats was “clear.”