Mice were less likely to have offspring when researchers disrupted their usual sleep and wake cycle, a new study says.

A study by an environmental group that suggested explosions from oil exploration were to blame for the deaths of nearly 900 dolphins off Peru’s coast has been refuted by the government on Wednesday, which said the dolphins died of natural causes. At least 877 dolphins have died since the start of ...

Calcium supplements might increase the risk of having a heart attack, and should be "taken with caution," concludes new research. Furthermore, boosting overall calcium intake from dietary sources confers no significant advantage in terms of staving off heart disease and stroke, the findings indicate.

Children are more likely to have more body fat during childhood if their mother has low levels of Vitamin D during pregnancy, according to scientists. Low vitamin D status has been linked to obesity in adults and children, but little is known about how variation in a mother’s status affects ...

The number of viral infections during infancy is not associated with wheezing later in childhood, according to a new study.

Residents of Lower Manhattan who suffered home damage following the September 11 terrorist attacks are more likely to report respiratory symptoms and diseases than area residents whose homes were not damaged, concludes a new study .

Traditional "hunter-gatherer" and "horticulturalist" populations have significantly lower age-related increases in blood pressure and less risks of atherosclerosis than "modernized" populations. Lifestyle factors of these traditional populations -- high physical activity and high fruit and vegetable diets -- may protect against normal aging phenomena, high blood pressure and hardening of ...

Scientists have discovered brain cells in monkeys that may be linked to self-awareness and empathy in humans.

Research has linked immune system strength to how many colds a baby has in the first year of life.

Innate differences in immunity can be detected at birth, according to new research. And babies with a better innate response to viruses have fewer respiratory illnesses in the first year of life.

During the 2008 Beijing Olympics, changes in air pollution were associated with changes in biomarkers of systemic inflammation and thrombosis (formation of blood clot) as well as measures of cardiovascular physiology in healthy young persons, according to a new study.

What goes bump in the night? In many U.S. households: people. About 3.6 percent of US adults -- or upward of 8.4 million -- are prone to sleepwalking, new research shows. The work also showed an association between nocturnal wanderings and certain psychiatric disorders, such as depression and anxiety. A ...