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All medications come with risks, and one of the risks with popular heartburn medicines seems to be that they interfere with the absorption of vitamin B-12. That can cause troubling symptoms, from anemia and depression to dementia.

After a tough year in which some of its pants allowed too much to be seen, the yoga clothier has found a new CEO. Also, founder and Chairman Chip Wilson plans to step aside. He caused controversy with comments about why some women's bodies may not fit into his company's pants.

Durable and imagination-inspiring, blocks can provide a solid foundation for learning and creativity.

"The launch of HealthCare.gov was flawed and simply unacceptable." Those are the words of Health and Human Services Secretary Kathleen Sebelius, published today, just before she spent time with people who share that view: members of the House Energy and Commerce Committee.

Shifting to a diet that's packed with pork, cheese and eggs has a big influence on the trillion of bacteria living in our guts, even after just a few days, new research shows.

"This is it," Webb said of Fitzgerald. "I have a real singer now. That's what the public wants."

People who have surgery or are hospitalized for serious illnesses sometimes develop dangerous staph infections. The culprits can be bacteria that were living on people all along. Scientists say the germs thrive in remote parts of the nose that aren't typically tested. Other benign microbes might help keep the bad ones at bay.

South Africans were given a chance to say farewell to Nelson Mandela in Pretoria, where his body will be lying in state until Friday. He will be buried on Sunday in his home village of Qunu.

Time magazine has named Pope Francis as its Person of the Year. The magazine cited Francis' willingness to take on thorny issues such as homosexuality, the role of women in the church, poverty and the nature of capitalism. At the same time, the pontiff has done so while projecting an air of humility and compassion, which has captured the world's attention in just nine months.

Student athletes know they need to avoid concussions. But hits that don't cause concussion symptoms can affect the brain, too. Researchers are now trying to figure out who is most at risk from those smaller hits, and if they can be warned in advance.