‘Transformed into disturbed alien creatures’: the scary world of parasomniacs, 2003

In extreme cases sleep disorders could be life-threatening

‘I definitely got a little loopy’: the writer who spent a week underground studying sleep

Lynne Peeples on the ways modern life interferes with our circadian rhythms – and what we can do to sleep better

Trouble sleeping? This therapy can help with insomnia

CBT-I involves actions like changing what you do when you can’t sleep and reframing anxious thoughts about slumber

What causes snoring, is it dangerous and how can it be treated?

Scientists say an epilepsy drug could reduce sleep apnoea symptoms, but how else can snoring be tackled?

Epilepsy drug could reduce sleep apnoea symptoms, study finds

Sulthiame may help prevent patients’ breathing from temporarily stopping, international research suggests

Linking two realms: efforts to tap real-life potential of lucid dreams advance

Scientists show it is possible to control a virtual car and switch on real-world kettle from inside a lucid dream

Discovery of different forms of insomnia could lead to better treatment

Brain scans reveal evidence of five subtypes, raising prospect of tailored approaches to improving sleep

Forget the 5am starts! Night owls like me possess the real secret of success

A new report suggests self-declared night owls tend to have higher cognitive scores. So please can we now ditch the lazy and undisciplined stereotypes, writes Arwa Mahdawi

I dreamed my best friend was gossiping about me. Why did I feel hurt after?

Dream emotions can carry over, but our memories of dreams aren’t always accurate. Here’s what experts say

Sleep review – marriage unravels in gleeful Korean somnambulist psycho-chiller

Lee Sun-kyun appears posthumously in one of his best performances as an actor struggling to control his night-time excursions in this elegant and intimate horror