Magnetic fields link and unlink, releasing a massive amount of power. Directing the power outward turns the fusion reactor into a thruster. A Department of Energy (DoE) physicist has a new nuclear fusion rocket concept that uses magnetic fields to make thrust. It’s a far-out idea that could carry astronauts to Mars. You like nuclear. So do we. Let's nerd out over nuclear together. The mechanism is already at play in Earth’s nuclear fusion reactors, as well as the solar flares of the sun. Could we really use linking and unlinking magnetic fields to make the long trip to the red planet?