Ahhh, you open up yet another can of worms here Cecil.

Most don't believe in "space" (darn commie buggers probably don't believe in
Santa Claus either!) and simply consider it the absence of ALL "matter."
However, I think it is now also generally accepted, all the matter in the
universe was/is "ripped" (big bang?) from the very fabric of space--i.e.,
space existing in an "altered form."
Although, we effortlessly travel through it (in our "altered state of
being") it does have form and structure--simply one which is invisible and
undetectable to us mere mortals...

Warmest regards,
John