Even in areas with moderate-to-high levels of traffic pollution, regular physical activity reduced the risk of first and recurrent heart attack, according to new research in Journal of the American Heart Association, the Open Access Journal of the American Heart Association/American Stroke Association.

An analysis of more than 1,000 people with and without psychiatric disorders has shown that nitrates—chemicals used to cure meats such as beef jerky, salami, hot dogs and other processed meat snacks—may contribute to mania, an abnormal mood state. Mania is characterized by hyperactivity, euphoria and insomnia.

The risk of having a heart attack while pregnant, giving birth, or during the two months after delivery, continues to increase for American women, a study finds.

Infections like Nipah virus and Ebola have begun to appear more rapidly among human populations over the past twenty years, but experts have yet to conclude why this may be the case.

A magnetic wire used to snag scarce and hard-to-capture tumor cells could prove to be a swift and effective tactic for early cancer detection, according to a study by researchers at the Stanford University School of Medicine.

New research published in PLOS ONE this week demonstrates dramatic positive benefits for native trees following rat removal at Palmyra Atoll, a magnificent National Wildlife Refuge and natural research laboratory located about 1000 miles south of Hawaii.

There's increasing consensus that drinking coffee is mostly good for you. In addition to the physical boost it delivers, coffee also appears to lessen our risk of heart disease, diabetes, some cancers, dementia and Alzheimer's disease. It has been demonstrated, in studies, to improve both problem-solving and decision-making. And coffee may even help us live longer, according to a just-released British study involving nearly 500,000 adults in the U.K.

Men may recover more quickly from influenza infections because they produce more of a key lung-healing protein, a study from scientists at Johns Hopkins Bloomberg School of Public Health suggests.

A new, highly accurate MRI technique can monitor iron levels in the brains of multiple sclerosis (MS) patients and help identify those at a higher risk for developing physical disability, according to a study published in the journal Radiology.

Preventing reservoir evaporation during droughts with floating balls may not help conserve water overall, due to the water needed to make the balls.