What many commuters choking on smog have long suspected has finally been scientifically validated: air pollution causes lung cancer.   The International Agency for Research on Cancer...

U.S. Food and Drug Administration advisers on Friday unanimously voted in favor of a highly anticipated hepatitis C drug from Gilead Sciences that holds promise for millions infected with the...

When we sleep, our brains get rid of gunk that builds up while we're awake, suggests a study that may provide new clues to treat Alzheimer's disease and other disorders.   This...

Researchers at the University of British Columbia are closing another avenue for cheating in sports — a DNA test that can catch athletes who use blood doping.   The test is touted as...

New research suggests that high levels of BPA, a chemical in many plastics and canned food linings, might raise the risk of miscarriage in women prone to that problem or having trouble getting...

The last piece of legislation President John F. Kennedy signed turns 50 this month: the Community Mental Health Act, which helped transform the way people with mental illness are treated and cared for...

Fertility clinics have put a new twist on how to make babies: A "two-mom" approach that lets female same-sex couples share the biological role. One woman's eggs are mixed in a lab dish...

Human breast milk is sold for babies on several online sites for a few dollars an ounce, but a new study says buyer beware: Testing showed it can contain potentially dangerous bacteria including...

Three years ago, French researchers declared that a centuries-old mummified head was that of the beloved King Henri IV. But now a new study says, "Non!"   The original conclusion...

The longest, most comprehensive follow-up yet of women given hormone pills during landmark government research found many health risks faded and some unexpected benefits emerged, but advice remains...