Our sample consisted of 29,815 volunteers aged 18–85 years. Table 1 shows descriptive information on demographics, medical factors, sleep duration and visual impairment. The mean age was 48 years, ...

Melatonin is a naturally produced molecule that has long been suspected to play a role in healthy sleep, but it has been ...

Researchers in a new study zoomed in on the function of sleep using a common fruit fly to find out how animals rest yet remain alert to danger, even when sleeping. Previously, study authors explained ...