Sleep

Sleeping in a moderately lit room may have health effects, small study shows.

Even if humans have trouble telling time in the "land of the midnight sun," many animals can adjust their schedules to the summer solstice.

Researchers have successfully achieved real-time communication with a sleeping person by invading their dreams in several independent experiments.

Here is the science behind 13 Halloween horrors come to life.

Researchers at MIT have developed a new method called targeted dream incubation (TDI) for planting suggestions that can shape a sleeper's dreams.

The main function of sleep may change as our brains do.

No one knows how consciousness works in the brain, but a team of neuroscientists seems to have found an engine that keeps it going.

A new video shows the rhythmic sloshing of cerebrospinal fluid in the human brain during sleep.

Although the exact cause of these experiences remains a mystery, the authors say the phenomenon may be tied to certain sleep abnormalities.

If you're not a morning person or a night person, but more like a midday person, don't feel left out.

Sleep learning, the way people commonly think of it, is almost certainly impossible. But researchers are discovering types of learning that occur during sleep, with exciting applications.