MIT researchers announce a breakthrough in magnet technology that paves the way to green fusion power. “On Sep 5, a large high-temperature superconducting electromagnet was ramped up to a field strength of 20 tesla, the most powerful magnetic field ever created,” MIT News reports. The new magnet allows far better control of fusion plasma inside a much smaller reactor—a watershed moment for the technology. “None of us are trying to win trophies at this point,” notes MIT’s Maria Zuber. “We’re trying to keep the planet livable.”