It's solving the world's most important problems, of course. The Jaguar XT5, at the Oak Ridge National Laboratory in Tennessee, has a speed of 1.759 petaflops. Researchers have already booked time with the machine for 2010. The National Oceanic and Atmospheric Administration will use the Jaguar to make super specific predictions about climate change, and the University of Tennessee will use it to figure out how to make better ethanol from plant cells. Good news.