From a quantummechanic standpoint its wrong to say, that its at two places at once. I really dont like the Headline. Superposition means, that it didnt decide for one of the two possible states, and so these both exist in superposition.
The way I intuit it, QM systems seem to be described by their wavefunctions sort of the same way a bunch of sine waves together makes music. You could have a QM system that is spatially (mostly) at X, represented by a wave function, or at Y, represented by another, but the third option, a superposition, is the combination of those two wave functions.