The professor, legend had it, was something of a real 'Dr Strange,' they say she'd reality hopped a number of times. You see, time is not a continuum but a kind of energy. Each reality has its own 'frequency.' She had found a way to connect to the soul-ether energy field, match the resonate frequency of other realities and thus travel there, not in body but in spirit form. The matter that belongs here stays here. As such, it's a form of astral projection.