Don't say "mental retardation" - the new term is "intellectual disability." No more diagnoses of Asperger's syndrome - call it a mild version of autism instead. And while "behavioral addictions" will be new to doctors' dictionaries, "Internet addiction" didn't make the cut.

Gallbladder surgery is usually a very safe operation, but a powerful congressman's death is a reminder of the known risks.

A Massachusetts woman was convicted of second-degree murder Tuesday in the fatal prescription drug overdose of her 4-year-old daughter.

Some North Carolina dentists hope to create a new kind of mid-level dental worker as a way of expanding care to people in poor and rural areas of the state. But the effort faces a long and arduous road.

Just over two years ago, Rajendra Pachauri seemed destined for a scientist's version of sainthood: A bearded vegetarian economist-engineer who leads the United Nations' climate change panel, he accepted the 2007 Nobel Peace Prize on behalf of the panel, sharing the honor with former Vice President Al Gore.

Endeavour zoomed toward a midnight rendezvous with the International Space Station late Tuesday, and NASA grew ever more optimistic that the shuttle is free of any launch damage.

A critical safety net for babies - that heelprick of blood taken from every newborn in the U.S. - is facing an ethics attack.