3 of 7
Can my cell phone give me brain cancer?
Cell phones are, essentially, two-way radios that emit low levels of radiofrequency (RF) energy both during stand-by mode and when you're using them. Scientists have found that exposure to RF over a prolonged period of time (22 hours a day in animal experimentation) can cause adverse health effects by heating up body tissue. As for humans? According to the FDA, "The available scientific evidence does not show any definitive health problems associated with using a cell phone." Then again, the FDA website also points out there's no proof that wireless phones are absolutely safe, either.

Bottom line: The jury's leaning heavily toward feeling safe, but it's still out. Our educated guess? Talk on.