Body of Rhythm

"I went to a seminar on the importance of sleep," the joke goes, "but I don't know what was said because I slept through it." We've all heard the statistics about how much time (aka money) is lost, not to mention accidents caused, by our lack of sleep. We seem obsessed by the topic (http://somanyinterestingthings.blogspot.com/2012/03/time-to-sleep.html, http://somanyinterestingthings.blogspot.com/2012/06/night-moves.html, http://somanyinterestingthings.blogspot.com/2013/02/perchance-to-dream.html, http://somanyinterestingthings.blogspot.com/2012/12/when-women-sleep-or-not.html, http://somanyinterestingthings.blogspot.com/2013/05/the-bank-of-zs.html), but not, it seems, enough to really do anything about it, and this is a huge mistake, say scientists.
   "We are the supremely arrogant species," declares University of Oxford professor Russell Foster. "We feel we can abandon four billion years of evolution and ignore the fact that we have evolved under a light-dark cycle": (story, link to great interactive body-rhythm information and early-bird-vs-night-owl quiz): http://www.bbc.com/news/health-27286872