You may feel tired, but you're probably just being whiney, at least according to a new study on how sleep we get. Looking through time-use data collected by the government, some researchers at the University of Maryland found that we get an average of 8 hours and 12 minutes on weekdays, and 9 hours and 12 minutes on weekends. Not so bad! I'd be interested in seeing the distribution of those hours (i.e, how much does the average worker get, rather than the average American), but it seems a good thing. Weirder, though, is what time we wake up. 5:35 a.m on weekdays, 7:12 a.m on weekends. That seems brutal, and definitely untrue for the "childless urban twentysomethings" set.