Humans may not hibernate, exactly, but that doesn't necessarily mean we're totally unaffected by the changing of seasons.

Howcast - Don't put up with another winter of discontent. There are simple things you can do to lift yourself out of the doldrums.

Howcast - Learn about seasonal affective disorder, also known as SAD, from psychiatrist Ankur Saraiya in this Howcast video.

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...

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.