University of Michigan researchers are investigating a radical new design for cargo ships that would eliminate ballast tanks, the water-filled compartments that enable non-native creatures to sneak into the Great Lakes from overseas.

Dr. Oveta Fuller is a respected researcher in microbiology and immunology, an expert on viral infections. But her most vital work takes place outside the lab, when she combines her scientific knowledge with faith. Turns out that one of her most effective weapons against AIDS is the fact that she’s not only a scientist, but a pastor.