HealthDay - FRIDAY, March 12 (HealthDay News) -- Most people will welcome the start of daylight savings time this Sunday because it starts to stay light longer, even if that means the early mornings will be dark once again.

HealthDay - SATURDAY, March 13 (HealthDay News) -- Mona Lisa's smile remains one of art's great mysteries, and many credit it with the portrait's enduring appeal.

HealthDay - SATURDAY, March 13 (HealthDay News) -- Job-related eye strain and injuries cost the American economy billions each year in lost productivity, but 90 percent of those problems could be prevented with simple measures, such as having workers wear properly designed and fitted protective eyewear, experts say.

HealthDay - SATURDAY, March 13 (HealthDay News) -- Running a marathon is challenging enough, but now new research shows that the performance of female marathoners can be hindered by a certain type of air pollution.

HealthDay - SATURDAY, March 13 (HealthDay News) -- When the stock market declines, do heart attacks go up? That's what Duke University Medical Center researchers are wondering based on an analysis of data collected during the current U.S. economic crisis.

HealthDay - SATURDAY, March 13 (HealthDay News) -- If regular exercise such as jogging is good for the heart, then turbo-charged workouts like training for marathons must be even better, right?

HealthDay - SATURDAY, March 13 (HealthDay News) -- The common skin ailment psoriasis may boost the risk for heart attack, stroke and other cardiovascular woes, probably through a shared inflammatory response, a new Danish study found.

HealthDay - SATURDAY, March 13 (HealthDay News) -- Police who responded on 9/11 to the collapsing World Trade Center towers appear to be at greater risk for heart problems compared with people in the general population, a new study finds.

AP - Stock market slides may hurt more than your savings. New research suggests they might prompt heart attacks.

AFP - The most commonly used prostate cancer screening procedure, PSA, is at the center of a growing debate after its discoverer said it had become a "hugely expensive public health disaster."