The 24-hour darkness during the winter near the Poles can disrupt sleep – this is how the people who live there cope.

From carefully timing meals and bedtime to turning down the lights and banning screens in bed, here's what the scientists who ...

MOST people want to sleep better. Not only does waking up in the night and struggling to nod off leave you feeling groggy the next day, poor sleep has been linked to a number of chronic health ...