The shout came after years of after-school effort inside a Dallas home, where a seventh grader had been quietly assembling a machine most people only encounter in advanced laboratories. For Aiden McMillan, that moment confirmed something extraordinary. His homemade device had produced nuclear fusion. Now, at 12, the Dallas Independent School District student is seeking recognition from Guinness World Records as the youngest person to achieve it. McMillan’s project began long before wires and vacuum pumps entered the picture. He first became fascinated with fusion at age 8, then spent two years studying nuclear physics concepts before attempting early prototypes. Curiosity drove the work, not competition. “I mean, I loved the project, but I also kinda hated it,” McMillan said. Now, at 12, the Dallas Independent School District student is seeking recognition from Guinness World Records as the youngest person to achieve nuclear fusion. (CREDIT: Aiden McMillan) Four years of persistence in a spare room The effort stretched across four years, blending theory with hands-on learning. Evenings and weekends meant calculations, research, and gradual assembly …