Why We Sleep

Sleep—if you’re like the majority of people living in the developed world, you’re probably not getting enough of it. Matthew Walker, a professor of neuroscience and psychology at UC Berkley, is here to spell out why that’s a problem. What follows is a selection of the most fascinating (or perhaps terrifying) facts from his bestselling book, Why We Sleep, a forthright look at the dire consequences that can result from a lack of shuteye.