“Supercomputers are already used to predict weather and earthquakes, but there’s not currently enough computing power to model complex biological systems precisely enough to make endeavors like large-scale transitioning to wind energy, for example, feasible. An exascale computer would be powerful enough to uncover answers to questions about, say, climate change and growing food that can withstand drought. It could even predict crime (hopefully with more accuracy and fairness than current predictive policing systems).”