Researchers are investigating the link between lead-contaminated water and chloramine, a chemical disinfectant that is increasingly used in municipal water supplies. (p. 357)

Measurement of an electrical abnormality in the heart aids doctors in determining who is most at risk for cardiac arrest. (p. 365)

A common heart procedure called angioplasty doesn't save lives if it is performed more than a couple of days after a heart attack. (p. 365)

Men whose hearts beat faster over time are likely to die earlier than those whose hearts keep an unchanging cadence year after year, according to a 20-year study. (p. 342)

In the Pacific Northwest, sea lice that spread from cultivated salmon to their wild counterparts have become major parasites affecting the wild population. (p. 333)

A chemical found in turmeric may prevent cognitive impairment. (p. 316)

Novel heart devices fashioned mainly from materials that the body can absorb or break down have made their debut in heart patients. (p. 277)

The size to which insects grow is limited by their need to route oxygen to tissues in their legs. (p. 270)

Pesticide-containing waters leave frogs more susceptible to fungal infections than pristine environments do. (p. 270)

At approximately the middle of October, the population of the United States will hit and then quickly eclipse 300 million, according to the U.S. Census Bureau. (p. 238)

Nearly half a million cases of attention-deficit hyperactivity disorder among U.S. children are related to exposures to lead or their mothers' smoking while pregnant. (p. 238)

Men who alternate between daytime and nighttime shifts on their jobs have triple the normal rate of prostate cancer, according to a Japanese nationwide study. (p. 195)