Fusion energy may have an unexpected cosmic role beyond clean power. A new study suggests fusion reactors could produce axions, hypothetical dark matter particles, when high-energy neutrons from fusion reactions strike reactor walls. These interactions may generate axions that escape shielding undetected. Scientists propose future fusion plants could double as dark ma…Fusion energy may have an unexpected cosmic role beyond clean power. A new study suggests fusion reactors could produce axions, hypothetical dark matter particles, when high-energy neutrons from fusion reactions strike reactor walls. These interactions may generate axions that escape shielding undetected. Scientists propose future fusion plants could double as dark ma…