The Electric: Commonwealth Fusion Backs a Rival's Attempt at Cheaper Fusion

Commonwealth Fusion Systems has raised almost $3 billion to solve one of the most vexing problems in technology—how to create energy the same way the sun does. Now the Massachusetts startup has agreed to provide one of its main breakthroughs—gigantic advanced magnets that enable fusion reactors—to a smaller rival in a partnership that could speed the development of a new power source.