Meanwhile, the research world is scrambling to replicate Salford's surprising results. His team exposed 32 rats to 2 hours of microwave radiation from GSM cellphones. Researchers attached the phones to the sides of
the rats' small cages using
for intermittent direct exposure--and varied the intensity of radiation in each treatment group to reflect the range of exposures a human cellphone user might experience over the same time
period. Fifty days after the 2-hour exposure, the rat brains showed significant blood vessel leakage, as well as areas of shrunken, damaged neurons. The higher
the radiation exposure level, the more damage was apparent.
The controls, by contrast, showed little to no damage. If human brains are similarly affected,
Salford says, the damage could produce measurable, long-term mental deficits.