R. Aileen Yingst, adjunct assistant professor of Natural and Applied Sciences at the University of Wisconsin-Green Bay, has won a $153,950 grant from the National Aeronautics and Space Administration to conduct a study that may provide clues about the origin and history of the planet Mars, and also offer revelations about earth. Yingst will study rocks observed during the 1997 Mars Pathfinder mission when instruments landed on the surface of Mars transmitted information about the planet to scientists on earth. Results of the study may help to answer important questions.