Richard Wiseman: My research suggests a correlation between getting a good night’s sleep and achieving your ambitions. So here’s five ways to improve your shut-eye
James Proud’s sleep monitoring device is a step beyond those on the market, sensing a range of environmental factors to help you get a better night’s sleep
Open thread: Tough leaders such as Vladimir Putin or Margaret Thatcher boast about being able to operate on only a few hours shuteye. Tell us about your sleep routines
Studies show that exposure to light after dusk is quite literally unnatural, and may be detrimental to health. Do we need 24/7 garages, supermarkets and TV – or should the city that never sleeps be put to bed?