This seems a reasonable question to me, not having read the article. IIRC from grade school days, only a few metallic elements are magnetic. Iron, nickel, cobalt, and some rare earth metals. That was a long time ago and doubtless oversimplified, but please do enlighten me why it would be expected to be magnetic?
It seems like they must still be assuming it's largely made of Iron.
It seems like they must still be assuming it's largely made of Iron.