Los Angeles, California - More than half a million older Californians - 12.6 percent of the state’s senior population - fall more than once a year, but nearly 60 percent of them fail to seek medical attention afterward, according to a new study by the UCLA Center for Health Policy Research.

Los Angeles, California - About 19 percent of North Americans suffer from constipation, with the digestive condition being more common among women, non-whites, people older than 60, those who are not physically active and the poor.

San Diego, California - For more than a century, the laboratory mouse (Mus musculus) has stood in for humans in experiments ranging from deciphering disease and brain function to explaining social behaviors and the nature of obesity. The small rodent has proven to be an indispensable biological tool, the basis for decades of profound scientific discovery and medical progress.

Davis, California - Long-term exposure to triclosan, an antimicrobial agent commonly found in a broad array of soaps, shampoos, toothpastes and other consumer products, may have potentially serious health consequences, reports a research team including a UC Davis scientist.

Los Angeles, California - According to a new nationwide survey, most Americans are worried about the spread of Ebola abroad, but less about it affecting America or their own families.

Cambridge, Massachusetts - For as long as she can remember, Andrea Ippolito has known that she wanted to be an engineer.