Can't sleep? Maybe it's your cell phone's fault (and it doesn't even involve ringing in the middle of the night): a recent study by scientists at the Wayne State University showed that prolonged exposure to cell phone signal can lead to bad sleep:
The study indicates that during laboratory exposure to 884 MHz wireless signals, components of sleep, believed to be important for recovery from daily wear and tear, are adversely affected. Moreover, participants that otherwise have no self-reported symptoms related to mobile phone use, appear to have more headaches during actual radiofrequency exposure as compared to sham exposure. However, subjects were not able to detect the true exposure status more often than would have been expected by statistical chance alone.
http://piers.mit.edu/piersonline/piers.php?volume=3&number=7&page=1148 - via Response Source