If you’ve ever stared at the ceiling doing mental maths about how little sleep you’ll get if you “don’t fall asleep in the next 10 minutes”, you’re exactly the audience the so-called military sleep ...

Countless people find themselves tossing and turning when bedtime arrives. With life's pressures weighing heavily, it's all too common to find yourself staring at the ceiling, fretting about finances, ...

From napping half their brain while flying to taking four-second naps to survive parenthood, these animals have evolved clever ways to catch some shuteye. Every animal with a brain needs sleep - and ...