Fusion Energy Net Gain Repeated and Improved

Researchers at the National Ignition Facility and Commonwealth Fusion Systems published 2025 results demonstrating repeated and improved net energy gain in fusion reactions, achieving a record 1.8 times the input energy across three separate experiments. Scientists described 2025 as the year fusion energy definitively transitioned from theoretical to engineering challenge, with a quantified 15% reduction in energy losses per reaction compared to 2024 benchmarks.