Study Links Cell Phones to Rat Tumors Without Judging Human Risk

Researchers found a link between mobile phone radiation and cancerous tumors in rats, adding to the ongoing inquiry into whether the devices pose a risk to users even as officials cautioned against extrapolating the results to humans.

There is “clear evidence” that male rats exposed to high levels of radio frequency radiation used in mobile phones developed cancerous heart tumors, the U.S. National Toxicology Program said in releasing a final report summarizing a 10-year study. Scientists found “some evidence” of the link when they released a draft report in February. The change followed a peer review.