Nancy Morrow-Howell, PhD, is a national leader in gerontology, widely known for her work on productive and civic engagement of older adults. She is the Bettie Bofinger Brown Distinguished Professor of Social Policy at the Brown School and director of the Harvey A. Friedman Center for Aging, part of the Institute for Public Health.

Scientists are eager to make use of stem cells’ extraordinary power to transform into nearly any kind of cell, but that ability also is cause for concern in cancer treatment. New research at the School of Medicine has revealed that these stem cells are present even in slow-growing, less aggressive tumors.

Isotopic analysis of animal teeth from a 2,000-year-old herding settlement in southern Kenya casts doubt on a longheld belief that tsetse fly-infested bushland stalled the spread of domesticated animal herding in Africa. The study’s co-author is anthropologist Fiona Marshall, PhD, of Arts & Sciences.

Every austral summer, a group of volunteers heads off to a remote region of Antarctica to set up a field camp on the ice. For the next month, they search the ice and nearby glacial moraines for dark rocks that might be extraterrestrial in origin. Research scientist Christine Floss, of Arts & Sciences, describes this year’s trip, which included a record-setting day.