Leopold Grinberg, senoir research associate in mathematics and an international team of researchers have used three of the world's fastest supercomputers to create a detailed and sophisticated model of clot formation in an aneurism—a bulging of a vessel wall as it fills with blood. Grinberg's team used magnetic resonance imaging (MRI) data taken from a patient with an aneurism to create a realistic model of the major arteries in the patient's neck and brain and more than 300,000 computer processors to simulate a rupture of the aneurism, blood flow through the system, and formation of a clot. Read more about Grinberg's research in a Scientific American article on the topic.