Going by the findings of a new study, cell phones increases the risk of cancer. This is the findings of a $25 million study conducted by the National Toxicology Program (NTP), a branch of the National Institutes of Health (NIH), which is a United States (U.S) biomedical research facility based in Bethesda, Maryland. The study, which exposed more than 2,500 rats for two years to the type of radiation phone users are exposed to every time they use cell phone, increased the numbers of two types of deadly tumours — gliomas, a type of cancerous brain tumour, and malignant schwannomas, an extremely rare tumour of the heart. Previous studies linking cell phones to cancer have been inconclusive and controversial too and many scientists have been calling for more studies to determine the way forward. In the new study, the rats were exposed to different levels of radiation. The highest was up to seven times the amount human usually received when using a phone. Rats had a signifi...