Sleep, science and how to beat social jetlag

A good night’s sleep is a serious matter, says Robert Colville. Not just your mood but your health is at stakeSleep is surprisingly little understood. Scientists still haven’t agreed on how it evolved, or what its purpose is. What we do know, however, is that it is vital – and that many of us aren’t getting enough.This is partly a symptom of what I call “the great acceleration” – the speeding up of everyday life, driven largely by technology. As we work