Sunlight activates hormones essential for mood, sleep and reproductive health — that’s why it’s important to go outside when ...

Human emotions are among the most fascinating aspects of our psychology. One moment, we might feel energized and joyful, and the next, inexplicably irritable or sad. These emotional shifts commonly ...

Researchers from McGill University may have discovered the "holy grail" of bipolar disorder research: understanding what causes shifts between manic and depressed states. Sleep-wake rhythms in normal ...