‘Reality shrivels. This is your life now’: 88 days trapped in bed to save a pregnancy

The long read: Months before she was due to give birth, disaster struck for Katherine Heiny. Doctors ordered her to lie on her side in bed and not move – and gave her a 1% chance of carrying her baby to term

Dreaming of a cure: the battle to beat narcolepsy

A global struggle to find the cause of the rare condition that causes uncontrollable sleepiness has a long and strange history, but there’s hope of a cure at hand

What does it mean when we talk in our sleep?

It’s a compelling idea that people talking in their sleep might reveal their deepest secrets – but a new study suggests we mostly just say ‘no’ and use swear words

The harder I try to sleep, the more worry keeps me awake

Not getting enough sleep increases the risk of obesity and diabetes, depression and cancer – plenty to weigh on your mind at 2am

Is it healthier to sleep naked rather than in pyjamas?

A third of us don’t wear anything in bed, primarily in an effort to keep cool. But might it also have benefits for our fertility?

UK retailers halt sale of baby sleep positioners after US warning

American regulator has linked products to at least 12 baby deaths in the country, prompting action by firms including Tesco

‘Western society is chronically sleep deprived’: the importance of the body’s clock

The 2017 Nobel prize for medicine was awarded for the discovery of how our circadian rhythms are controlled. But what light does it shed on the cycle of life?

The Guardian view on the Nobel prize for medicine: about time

Editorial: The discovery of two interacting genes which make a body clock shared by all living things is a triumph that deserves its prize

‘Sleep should be prescribed’: what those late nights out could be costing you

Leading neuroscientist Matthew Walker on why sleep deprivation is increasing our risk of cancer, heart attack and Alzheimer’s – and what you can do about it

Why We Sleep by Matthew Walker review – how more sleep can save your life

A neuroscientist has found a revolutionary way of being cleverer, more attractive, slimmer, happier, healthier and of warding off cancer – a good night’s shut-eye