Scientists study dreaming to find answers to why we dream have found several potential answers: they help keep us asleep, they contribute to good mental health, and they help us find answers to questions we seek. But what do they mean, and can we control them?

Interview with sleep psychologist Shelby Harris on adjusting circadian rhythms, sleep hygiene, dreams, nightmares and sleep paralysis, narcolepsy, and more.

A leading neuropsychiatrist describes how our body and brains function in modern society.

Tutorial on Progressive Muscle Relaxation (PMR), an effective skill for coping with stress, anxiety and insomnia.

Robert Stickgold, sleep expert, on the role of sleep in memory consolidation and learning.

Designing environments that optimize light for physical and mental health.

Circadian rhythm disturbance and bipolar disorders: researching the connections.

A sleep expert discusses studies on how much sleep people get and correlations to mortality and performance measures.

Video guide through a progressive muscle relaxation exercise.

The benefits and characteristics of naps.