Stories by Nancy Shute

Firearm sellers have become unlikely allies of public health authorities in the effort to block people from killing themselves

A look at some of the most promising medical devices now in development

Conventional breast cancer screening tests are far from perfect. The next scans could focus on sound, light, breath and elasticity

Research on only one treatment is rigorous enough to earn an A grade

Diagnoses have soared, but valid treatments are few. Parents have turned instead to dubious, and often risky, alternative therapies

In addition to all of the nutrients flowing from mother to fetus, some of the developing child's cells pass back into the mother's body. New research shows how this fetal microchimerism may affect long-term health