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News from the world of medicine:

Physical activity in the present may prevent weight gain many years into the future, according to a study. Researchers who followed 3,554 people over two decades found that men who stayed highly active gained six pounds less on average after 20 years than their low-activity counterparts did. For women, the difference was a whopping 13 pounds. 

Analyzing data from nearly 400,000 men and women ages 50 to 71, researchers found that those who consumed the most fiber were 22 percent less likely to die from any cause during the nine years they were studied.

People who speak more than two languages during their lifetime may be at reduced risk of developing memory problems as they age, new research indicates.

A study of more than 3,000 children shows that low vitamin D levels are associated with increased likelihood that children will develop allergies.

New research lends support to the idea that exposure to a wide range of microbes explains why farm kids have lower asthma rates than city kids.

Taking a pomegranate pill a day may help slow the progression of prostate cancer, preliminary research suggests. The study is the latest to demonstrate pomegranate's promising antitumor effects,