Health - Time.com

On the 150th anniversary of the publication of On the Origin of Species, political journalist Dennis Sewell talks to TIME about how the naturalist's big idea has been harnessed for sinister ends Full Story »

Days after a government task force rolled back its mammography screening recommendations, another influential group issued revised guidelines on Pap tests for young women Full Story »

If the brouhaha over new mammogram guidelines has proved anything, it's that even modern medicine does not rely on statistics, scientific facts and clinical outcomes alone Full Story »

Among the many reasons for the high preterm birth rate in the U.S.: lack of insurance, cigarette smoking and elective cesarean-section deliveries that are scheduled too early Full Story »

An independent government panel this week abandoned its long-standing recommendation that healthy women over 40 get a breast-cancer screen once every year or two years Full Story »

Two deaths in people receiving the H1N1 vaccine were reported in China, where an estimated 12 million have been inoculated so far Full Story »

Twenty-five years after Baby Fae's death following the world's first animal-to-human infant heart transplant, TIME looks back at the history of the procedure Full Story »

In the span of a week, the CDC's official tally of U.S. deaths from swine flu has tripled. But does that say anything about the severity of the disease? Full Story »

Diet, exercise and genes aren't the only factors responsible for body weight, say researchers, who are discovering evidence of another component: the bacteria in your gut Full Story »

New data from a long-term survey suggests that U.S. teens are no less active today than they were in 1991. Yet they've gotten increasingly heavier over the same period Full Story »