We all know how we feel when sleep-deprived: tired, groggy, and grumpy. But have you ever considered all of the ways just a single poor night of sleep may be messing with you? Science has revealed a great many ramifications that you've probably never thought of. 1. You're more depressed and anxious. In 2008, researchers assessed 226 individuals who had six or more hours of sleep the previous night and 112 individuals who had less. The "poor sleep" group scored significantly higher in levels of stress, depression, and anxiety compared to those that slept longer.2. You pee more the next...