Genetically engineering tumors in mice, a technique that has dominated cancer research for decades, may not replicate important features of cancers caused by exposure to environmental carcinogens, according to a new study led by UCSF scientists.

About 30,000 people attended the Bay Area Science Festival's Discovery Days at AT&T Park, visiting more than 150 interactive science exhibits, experiments and games.

Physicians at the new UCSF Benioff Children’s Hospital San Francisco are dedicated to cutting-edge research that helps minimize invasive treatment for very sick children.