What are the scientific grounds for suspecting that radio-frequency signals can be harmful to living systems?
More than 500 studies have been conducted to explore the biological effects of cell phone radiations on biological tissue, particularly in animals. Scientists do not dispute that microwave radiation emitted by cell phones is absorbed into the brain — dramatically more so in children than in adults. In studies in experimental animals, this invisible radiation eases the ability of toxins to cross from the blood into the brain. They also produce free radicals and subtle changes in proteins that are tell-tale signs that cells have been damaged.