Discover what causes sleep talking, whether your nighttime chatter reveals hidden secrets, and how to reduce these nocturnal ...

Dogs, like humans, go through several sleep cycles—wakefulness, rapid eye movement (REM) sleep and non-rapid-eye-movement sleep. In the REM sleep period, the most memorable and vivid dreams occur.

Discover how sleep influences physical and mental health, improves daily performance, and helps prevent chronic conditions.

Deep sleep could be key to forestalling slow declines in brain health that may one day lead to Alzheimer's disease, the most ...

Medically reviewed by Daniel Combs, MD More than 50 million Americans have a sleep disorder. Regularly having trouble ...

Getting enough quality sleep may do more than just help you feel rested—it could play a critical role in protecting your ...