Predicted motions of hundreds of particles in a fusion reactor. The motions predicted with the new method (orange, red) agree very closely with those predicted by Newton’s laws (blue, green), but can be calculated 10 times faster. Image credit: University of Texas at Austin. AUSTIN, Texas —  Abundant, low-cost, clean energy — the envisioned result if scientists and engineers can successfully produce a reliable method of generating and sustaining fusion energy — took one step closer to reality, a...