SleepHow to optimise your slumberTo celebrate World Sleep Day, here's our science-based guide to getting the best slumber you can – from varying sleep with the seasons to taking inspiration from the past.FutureThe small sleeps that take us by surpriseFar shorter than a nap, microsleeps can last only a few seconds. They may be a sign of deeper problems getting decent sleep.FutureHospital bed location can determine sleep qualityResearchers in Guildford say fluctuating ward noise levels negatively impact on patient sleep.SurreyThe case for power napsMany of us refuse to power nap, thinking that it might affect a good night's sleep later. But it may in fact be good for us.FutureThe curious ancient beginnings of 'bed culture'From beds for Roman newlyweds, to "hangover" benches for 19th-Century workers: the pursuit of a good night's sleep has followed us through the ages.FutureWhy do some people feel tired all the time?It's surprisingly common to still feel tired after a long night's sleep.FutureWhy medieval people slept in cupboardsThese cosy, wardrobe-like pieces of furniture could reportedly sleep up to five people. Why did they fall out of fashion?FutureThe truth about burnoutFeelings of fatigue are worryingly common, and in some cases, burnout can be extremely debilitating. So what might we do to treat this malaise?FutureThe lost ancient practice of communal sleepUntil the mid-19th Century, it was completely normal to share a bed with friends, colleagues and even total strangers. How did people cope? And why did we stop?Future