This story was featured in The Must Read, a newsletter in which our editors recommend one can’t-miss story every weekday. Sign up here to get it in your inbox. For most of my adult life, I’ve been ...

A lack of sleep can make it extraordinarily difficult to retain information. Two new studies uncover why this is and what is happening inside the brain during sleep and sleep deprivation to help or ...

Obstructive sleep apnea, a condition that causes lower oxygen levels during sleep, is linked to degeneration of brain regions associated with memory through damage to the brain's small blood vessels, ...

A new survey reveals many Americans suffer from a potentially dangerous sleep disorder and aren't getting the treatment they need. March is National Sleep Month. Doctors say sleep apnea, when people ...

It might be worth working a little bit harder to get that much-desired, but often elusive, good night's sleep. Deep sleep clears the mind of waste just as a "dishwasher" cleans dirty plates and ...

Students often sacrifice sleep for late-night studying during exams. Adequate sleep improves memory, focus, and overall ...

A new study shows that even a moderate dose of caffeine alters brain activity during sleep, increasing complexity and nudging neural systems toward a high-efficiency processing state, especially in ...