Researchers at the University of Texas Southwestern Medical Center have carried out research that may have implications for our understanding of stress, depression and eating disorders. It may also help explain why some people overeat when they are stressed or depressed.

Nature Nurture Debate: Born Lazy? Don't like going to the gym? Hate exercise? Now there's an excuse: new studies on mice have shown that the desire to exercise may be largely determined by genetic factors. This suggests that some people may find it easy to increase their activity levels to get healthy, while others will struggle.