The four core individuals traditionally associated with the Fantastic Four, who gained superpowers after exposure to cosmic rays during a scientific mission to outer space, are: Mr. Fantastic (Reed Richards), a scientific genius and the leader of the group, who can stretch his body into incredible lengths and shapes; the Invisible Woman (Susan "Sue" Storm), Reed's wife, who can render herself invisible and project powerful force fields; the Human Torch (Johnny Storm), Sue's younger brother, who can generate flames, surround himself with them and fly; and the monstrous Thing (Ben Grimm), their grumpy but benevolent friend, who possesses superhuman strength and endurance. Since the original four's 1961 introduction, the Fantastic Four have been portrayed as a somewhat dysfunctional yet loving family. Breaking convention with other comic-book archetypes of the time, they would squabble and hold grudges both deep and petty, and eschew anonymity or secret identities in favor of celebrity status.