this was followed soon after by another study from scientists at the ramat seanie institute in italy. here scientists exposed more than 2000 rats to radiation the levels were much lower than those used in the u.s. study the dose was the equivalent to constantly standing around 50 meters from a mobile phone mast. the animals were exposed for around 1000 hours a day throughout their lifetimes starting while still in their mother's womb until their death. the result all the animals displayed evidence. of brain tumors. the scientists also noticed a significant increase in heart tumors. so is mobile phone radiation hazardous to human health or can these results not be transferred to humans. those are questions that cell biologist david schumann from the university of basel has also been studying he was somewhat taken aback by the results of the 2 studies on rats so after 3 of all the awful lot of operate 1st i was surprised that we saw anything at all. the 2nd surprise was that there were also more cases of the same kind of cancer in the study from italy even though the doses there were mu