I've been wondering why I've had insomnia on and off for the last couple of years. Some months I'd sleep like a baby. Other times, I would get no sleep at all. Now it seems there might be a smoking gun to the whole thing. I'll be keeping my cell phone far away from my bedroom for now on - where it should be.

Mobile effect on sleep

http://www.nhs.uk/News/2007/January08/Pages/Sleepandmobilephones.aspx