Here's a new answer for people who develop severe depressions or feel exhausted during winter: as days shorten and temperatures drop, many people's bodies attempt to prepare for a hibernation period that never comes. Whybrow has pioneered in studying human psychological and hormonal changes triggered by cold weather; his co-author, health-writer Bahr, admits to suffering from winter depressions since the age of 20. Together, they have created a fascinating and delightful exploration of the ancient animal mechanisms and rhythms that still influence our lives. The book outlines a number of ways that people who suffer winter lethargy, weight gain, or even depression can help themselves feel better. Details are given on increasing the amount of light exposure during short winter clays (a key factor), acclimatizing to cold temperatures as autumn progresses, eating a special anti-hibernation diet, and learning to alter one's sleep rhythms. A chapter on modifying home or office environments to create ""eternal spring"" includes interesting forays into the physiological and psychological effects of colors, sounds, and aromas. Circadian rhythms, winter vacations, indoor house plants, and health tips regarding sun exposure are among the wide variety of other topics discussed. Written with humor and energy, this unique and entertaining book offers intriguing health advice for hibernators and nonhibernators alike.