Two new studies shed light on how Alzheimer's may start far before symptoms arise and how sleep may affect your risk for developing dementia.

COVID-19's disruptions to your routine or your livelihood make it more important than ever to get good sleep. Researchers have four tips for you.

Lost sleep, stress, and loneliness can up your chance of getting sick. That includes COVID-19 risk. There are, however, things you can do.

Understanding more about how a system that protects brain cells affects sleep could reveal a connection between sleep disorders and neurodegenerative diseases.

Letting babies "cry it out" didn't harm attachment or development at 18 months, new research finds. The study lends scientific evidence to a heated debate.

The discovery of why some people are extreme "morning larks" could lead to therapies for inherited sleep disorders and those due to shift work or jet lag.

Sleeping well can help teens better cope with racial discrimination, a new study shows. It also finds that friends, not parents, help teens handle bias.

Gun owners aren't sleeping better or feeling happier than others, according to a study that contradicts claims that guns provide a sense of safety and empowerment.

There's an association between sleep duration and depression, anxiety, impulsive behavior, and poor cognitive performance in kids, researchers say.

Rewards can boost visual perceptual learning tasks but only after getting some quality shut-eye, new research shows.