Cell phone radiation is trending on the heels of a new study in the Journal of the American Medical Association .
Researchers found a 7 percent energy increase in brain tissue closest to the cell phone's antenna when subjects used a phone for 50 minutes. While that's several times less activity than visual brain regions show during an engaging movie, the study's co-author Dardo Tomasi says, "[I]t's still unnatural. Nature didn't prepare our brains for this."
Unlike previous studies that suggested a link between cell phone radiation and cancer, the new study doesn't conclude whether these effects are positive or negative. But it's the first to show that brain tissue is activated by exposure to cell phone radio frequencies.