If you're battling to sleep at night, the cause could be your cellular phone, according to new research. 

A Swedish studied people who were randomly exposed to a broadcast signal equivalent to that which they would receive if chatting on a cell phone.
A control group thought they were being blasted with the same amount of radiation, but weren't.
Those who really did get the radiation complained of headaches and battled to fall asleep, also having a more restless night.