Explore how our bodies instinctively react to cold weather to maintain a constant internal temperature. Learn about the physiological adjustments, from constricted blood vessels in extremities to the appearance of goose bumps, that...

If you often feel the winter blues, it may be more than normal sadness. While some welcome the change in seasons and the fresh snow of winter, others find themselves falling into feelings of depression. But this isn’t just short-lived...

Changes in sunlight can upset our circadian rhythms — and disrupt our moods. A clinical psychologist explains how seasonal affective disorder can still happen in the summer.

Seasonal affective disorder can make you feel tired, anti-social and hopeless. Here are the signs to look for and some ways to fight it.