新东方在线MAKE IT EASY王牌队典藏笔し时文2017koolearn目录新东方在线四六级目录刘琦一一外刊时文《卫报》时文…《哈佛商业评论》时文…《科学美国人》时文7《经济学人》时文…新东方在线▣微博微信刘琦—外刊时文新东方在线四六级《卫报》时文新东方在线四六级阅读导师刘琦@刘琦老师Sleep is surprisingly little understood.Scientists still haven't agreed on how itevolved,or what its purpose is.What we do know,however,is that it is vitaland that many of us aren't getting enough.This is partly a symptom of what I call "the great acceleration"-the speedingup of everyday life,driven largely by technology.As we work and play harder,sleep gets squeezed out.Studies show that we're getting less and worse sleep:in one survey only 15%of Britons said they felt refreshed by it.We've all read the warnings about reading iPhones in bed.But while that's partof the problem,there's something much bigger going on.What we think of asthe body clock isn't one clock at all.It's billions of them embedded into our everycell.This is why we get jet lag:those billions of clocks,and the processes theygovern(such as digestion or light-dark perception),get out of kilter with eachother.The great acceleration has nudged our bodies out of synch with the day/nightcycle-and the result is what experts call social jet lag.Welive at"work o'clock",wrenching ourselves back to normal at weekends.According to Till Roenneberg,one of the world's leading sleep researchers,"the majority of the population inthe industrialized world"suffers from this "forced synchrony"and pays theprice in terms of health and wellbeing since those clocks also control vitalprocesses such as detoxification or DNA repair.The more antisocial your schedule,the greater the problems.Shift work is nowclassified as a probable carcinogen by the World Health Organization,followingmonitoring of night workers such as nurses as well as studies in which micewere forced to flip their day/night cycle.As well as increased cancer risk,the1/12