Moira MacTaggert led a brilliant career as one of the world's leading geneticists, earning a Nobel Prize for her work. She founded a Mutant Research Center on Muir Island off the coast of Scotland. She eventually renewed contact with Xavier during a period he spent in England working on a degree in psychiatry. Xavier and MacTaggert discussed the possibility of establishing a school for training superhuman mutants in the use of their powers. Eventually, MacTaggert became Xavier's "silent partner" in founding this school, which trained the team of mutant adventurers known as the X-Men.
Rewound Reincarnation: Moira is reincarnated in a new timeline upon death. From her second life onward, she could recollect all the memories she experienced in her previous lifetimes from as early as in utero.
Undetectability: Moira's status as a mutant is invisible to mutant sensors and detectors. Mutant detectors will see her as a baseline human.
As of current research, Moira is currently on her 10th life of a total of Eleven lives.