The strongest signal of our changing climate flares while most of us are asleep.

People who do shift work are at higher risk for having a stroke later in life, even long after a return to a normal work schedule.

People who do shift work are at higher risk for having a stroke later in life, even long after a return to a normal work schedule.

The fast "splines" brain rhythm helps the left brain and right brain communicate better while running—and even while dreaming—research in rodents shows.

The worse quality of sleep that emergency medical service workers get, the more anger they feel on the job, researchers report.

Your body follows a circadian rhythm that influences everything from how well your medications work to the best time for exercise.

New research involving a brain-computer interface device confirms that the brain uses a phenomenon called "replay" to remember new information.

Researchers look at “replay” during sleep, which is theorized to be a strategy the brain uses to remember new information.

A new study offers a surprising finding about breast cancer: circulating cells that later form metastases mainly arise when a person is sleeping.

In a small study of healthy adults aged 55 and older, 5 mg of melatonin increased total sleep time compared to a placebo.