Preschool teacher Alex Grennan plays with Jillian Landy-Rogan, 2, inside the Women's Business Incubator space in the lower level of St. Andrew's Episcopal Church in Seattle's Green Lake neighborhood...
Color-enhanced scanning electron micrograph showing <i>Salmonella typhimurium</i> (red) invading cultured human cells. (National Institute of Allergy and Infectious Diseases)