Extra-curricular activities seem to minimize risky behaviors in teens, but there is a "tipping point" of too much participation, a U.S. study found.

Impaired sense of smell may occur in the early stages of Parkinson's disease and be an early indicator of the disease, a U.S. study found.

Incontinence symptoms can be helped by lifestyle changes -- especially pelvic exercises, two U.S. physical therapists say.

Parents who "over control" and "under control" their children may delay their development, a German study found.

More than half of U.S. nurses have been bullied at work and where nurses are bullied, the quality of patient care declines, a study found.

Coffee creamer can pack on the calories, the non-profit Center for Science in the Public Interest said Monday in Washington.

U.S. scientists are creating a three-dimensional camera with 12,616 lenses that might be used for such purposes as facial recognition or biological imaging.

The height of the pitcher's mound affects throwing arm motion and may cause injuries in a baseball players, a U.S. study found.

A U.S. and Japanese study used therapeutic cloning to treat Parkinson's disease in mice.

U.S. scientists have created "designer enzymes" in what is called a major achievement in computational chemistry and protein engineering.