Penn State faculty Radu Roiban has been awarded the prestigious Sloan Research Fellowship by the Sloan Foundation. These awards are intended to enhance the careers of young faculty members in seven fields of science: chemistry, computational and evolutionary molecular biology, computer science, economics, mathematics, neuroscience, and physics. Roiban's research in string theory and related fields will be strengthened by this award. String theory is a physical framework that holds promise to unify all known interactions in a quantum mechanically consistent way. Studying it can lead to understanding phenomena ranging from particle physics to quantum gravity.