Spacetime this, spacetime that....RIIIIIIIGHT

Is science actually suggestingg that space and time are one? And is science actually suggesting that this "spacetime" is curved? Does that mean that out there (even in our solar system, even US) there is a sort of "fabric" that is curved?

If this is only a model that helps us understand physics, and is purely mathematical, i have no problem with this whatsoever. Otherwise, please explain.

Thank you