Small cigars flavored to taste like candy or fruit are popular among U.S. teens, according to the first government study to gauge their use.   About 1 in 30 middle and high school...

London is famed for its historic sites, its double-decker buses and its West End shows, but the city now has a more dubious distinction: Britain's public health agency says it has become the...

U.S. obstetricians are getting more precise about exactly what determines a full-term pregnancy.   On average, a pregnancy lasts 40 weeks, counting from the first day of the woman's last...

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...