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Americans might live a little longer if they cut back on the amount of time they spend sitting down, a new study says. Reducing the daily average time that people spend sitting to less than three hours would increase the U.S. life expectancy by two years, the study found.

Study: Babies with pets healthier

A new study finds babies born to families with pets are healthier than kids without pets.

Ryan Roberts, the boy who inspired thousands of people to celebrate his life by having banana splits for dinner, died on Sunday.

A new study suggests that the human papillomavirus vaccine provides a benefit to women even if they are not vaccinated, via a phenomenon known as “herd immunity.”

People with darting eyes may look untrustworthy. Some even believe shifty eyes can indicate when someone is lying. But a researcher says they actually indicate something else entirely.

Laughing yoga cultivates merry mindfulness

Forget sculpted arms and bendy backs — the idea of laughter yoga is to make you happy.

The science behind why we get sunburned

Little is known about what exactly goes on in our cells to produce the painful, red inflammation associated with sunburn, but researchers now have discovered a molecular signal that triggers it.

For healthy kids, get a pet, study suggests

Kids who grow up with cats or dogs tend to get fewer respiratory infections during their first year of life, according to a new study from Finland.

Sick children, anxious parents

Nearly every child who has shown up in Cambodian hospitals with a mystery syndrome has died. Researchers think they have a good explanation for the outbreak but say more analysis is needed.

Since the 1980′s gay men were banned from blood drives. With shortages nationwide, dozens from congress encourage an end to the ban which perpetuates “unwarranted discrimination.”

Since the 1980′s gay men were banned from blood drives. With shortages nationwide, dozens from congress encourage an end to the ban which perpetuates “unwarranted discrimination.”

Sick children, anxious parents

Nearly every child who has shown up in Cambodian hospitals with a mystery syndrome has died. Researchers think they have a good explanation for the outbreak but say more analysis is needed.

Q&A: Dr. Vivian Pinn on hormone study

When the government-funded Women’s Health Initiative study was abruptly halted in 2002, the impact was huge, swift and charged with emotion. Dr. Vivian Pinn, one of the leading figures of the Women’s Health Initiative, spoke with msnbc.com about the lasting impact of the landmark study.

Search for clues in Cambodian disease

Health officials continued on Monday to investigate the causes behind the mysterious deaths of 64 children in Cambodia after saying they had made an important discovery over the weekend.

Search for clues in Cambodian disease

Health officials continued on Monday to investigate the causes behind the mysterious deaths of 64 children in Cambodia after saying they had made an important discovery over the weekend.

Families get health food subsidies

Mark Macdonald and CNN’s Don Lemon discuss a Washington DC program that gives low-income families health food subsidies.