There’s evidence to say we used to have two sleeps with a period of wakefulness in between.
Throughout history there have been numerous accounts of segmented sleep, from medical texts, to court records and diaries.
World map of artificial sky brightness.
F. Falchi, et al. Science Advances (2016)
Eighty percent of North Americans can no longer see the Milky Way at night. But the problem with light pollution isn't just about stargazing.
Catching those Z’s.
Sleep is often overlooked as a treatment for brain injury, but new research could be about to change that.
An election campaign is like a marathon; you can’t sprint the whole time.
Eight weeks of deadlines, debates, press releases, public appearances and handshaking. What should politicians and their teams do to stay healthy and sane?
One part of our brain keeps a lookout when we sleep in a new environment.
Have you ever arrived in a hotel room after a long flight and despite being exhausted, failed to fall asleep? This is called the first-night effect and we may have understood why it occurs.
New research suggests disrupted sleep patterns could have more impact on some measures of women's performance than men's.
Sleep problems can also create a loop of mental illness.
Alyssa L. Miller/Flickr
The relationship between insomnia and mental illness is bidirectional: about 50% of adults with insomnia have a mental health problem; up to 90% of adults with depression have sleep problems.
The European Space Agency is exploring what we can learn from animals about long-term deep sleep.
Most people know sleep is important. But few know a lack of it can put us at greater risk of heart disease and obesity.
Not getting enough quality sleep can have significant implications for health.
This has been you in meetings.
There are many factors that contribute to us falling asleep unexpectedly, in inappropriate places, or even when we really don't want to.
Innocence puts you at risk in an interrogation room.
Interrogation image via www.shutterstock.com.
Innocent people do confess to terrible crimes they had nothing to do with. Psychologists are investigating factors that contribute to false confession – including how well-rested a suspect feels.
Trying to fall asleep can be a tricky, especially when we try too hard.
We know that not getting adequate sleep means we do a disservice to our brain and our physical and metabolic health. But what are the real secrets to a good night’s rest?
We aren't slaves to our body clocks: changing your routine could make a huge difference to your sleep patterns.
About half of us will experience at least one lucid dream in our lives, where we are aware and may be able to take control of it. What can this tell us about consciousness?
Teenagers need nine hours sleep a night.
Make sure your teenager doesn't stay up all night.
Poor sleep can have a negative impact on a child’s health and wellbeing.
Messaging friends on social media at night is often a source of sleep problems. Setting limits on the use of technology in the evenings can help your child get the sleep they need.
Does listening to certain songs help us slip into the ether?
'Clouds' via www.shutterstock.com
Composer Max Richter – with his epic, eight-hour-long piece Sleep – aims to be an auditory sandman.
Sleep problems often occur just before an episode of mental illness.
What your sleep patterns may say about your risk of developing mental illness.
Not dark enough.
People in bed via www.shutterstock.com.
Is electricity making us sleep less? A new study on sleep in preindustrial societies suggests the answer is no. But it misses a big point: people in preindustrial societies spend more time in darkness than we do.
Catch those z’s.
The clocks going back hold the tantalising promise of an extra hour in bed. But the modern attitude towards that champion of indolence, the sloth, shows that sloth is still very much a deadly sin.