In the past decade, obesity has declined among U.S. teenagers from rich families but has risen among their impoverished counterparts, a gap driven by lack of exercise, said a study

In the past decade, obesity has declined among U.S. teenagers from rich families but has risen among their impoverished counterparts, a gap driven by lack of exercise, said a study Monday.

The number of people diagnosed with cancer annually in Britain has reached a new high of almost a third of a million, latest figures showed Tuesday.

More than 330,000 people were diagnosed with some form of the disease in 2011, the charity Cancer Research UK said -- an increase of almost 50,000 over the last decade.

A judge in New Mexico ruled Monday that terminally ill patients have the right to have doctors prescribe fatal drug doses to help them die, U.S. media said.

The ruling Monday after a two-day trial would make New Mexico the fifth U.S. state to adopt such a policy.

Health officials in a Pakistani tribal region Monday hailed the success of an anti-polio drive that had been threatened by a vaccinator boycott and said the program would be extended.

The three-day campaign, which started on Saturday, was aimed at administering polio drops to at least 40,000 children in the Jamrud and Landi Kotal towns of the Khyber tribal district.

Nine women in Sweden have successfully received transplanted wombs donated from relatives and will soon try to become pregnant, the doctor in charge of the pioneering project has revealed.

The women were born without a uterus or had it removed because of cervical cancer. Most are in their 30s and are part of the first major experiment to test whether it's possible to transplant wombs into women so they can give birth to their own children.

A jolt of caffeine can boost memory, according to a study published Sunday that provides a scientific motive for students slurping coffee, tea or energy drinks when cramming for exams.

A team at Johns Hopkins University in Baltimore, Maryland, found that caffeine enhances certain memories for at least a day after they were formed.

India on Monday marked three years since its last polio case was reported, a major milestone in eradicating the crippling disease.

The marker puts the country on course to being formally declared polio-free in March. The World Health Organization stills need to confirm there are no undetected cases before making the official declaration.

A 58-year-old Utah woman is expecting a baby she is carrying for her daughter, with plans to give birth to her own granddaughter, reports said Friday.

Julia Navarro, a Peruvian who lives in the western U.S. state, agreed to be implanted with one of her daughter Lorena McKinnon's fertilized eggs after the 32-year-old had a string of miscarriages.

Fifty years ago, almost half of Americans smoked cigarettes -- at work, in restaurants, schools and even in hospitals. Then came a landmark warning that changed everything.

The Surgeon General's report on smoking and health, issued January 11, 1964, was the first of its kind to alert the public that cigarettes caused lung cancer and other fatal tumors.

Lung cancer rates in the United States are falling as a direct result of efforts to control smoking and other tobacco use, according to research published on Thursday.

The decline affects both men and women, said data from the Centers for Disease Control and Prevention (CDC), reported in the organization's Morbidity and Mortality Weekly Report.