Nancy Shute

Twenty years ago, many scientists didn't think that genes could cause diseases like cancer. The discovery of the BRCA gene for hereditary breast cancer changed that. Mary-Claire King tells how.

The bottles that appear to have been tampered with contained tablets and capsules in various shapes and colors, rather than the turquoise capsule used for the over-the-counter medication alli.

Pediatricians have long asked parents if they have guns in the home, in an effort to reduce accidents and suicides in children and teens. That could help protect older patients too, a study says. But the notion of doctors asking about gun ownership is controversial.

Social scientists say three things matter for success in life: IQ, family's socioeconomic status and one thing that's easy to influence: self-control. A child's self-control in preschool helps predict possible health, substance abuse and financial problems later in life, researchers found.