Have any studies or has any research been done suggesting a
correlation between dark matter and the other dimensions posited in
Super String-Membrane (SS-M) theory? If those extra dimensions
actually exist, and if the idea that they are "rolled up to less than
a Planck length" is not an accurate assessment, maybe there is another
explanation for all this.
Start by imagining those other dimensions are actually a stack of
planes, each of which is less than a Planck length thick. Imagine a
deck of cards, each of which was less than a Planck length in
thickness. Even if this deck of cards was comprised of an infinite
number of cards the entire stack would not be discernable to us, from
our spatial dimensions frame.
Label our discernable spatial set as X, Y & Z. Then label another
spatial set as W, X & Y. This second spatial set would share the X & Y
dimensions with our spatial set but if the W dimension was comprised
of an infinite stack of X-Y planes, each of which was less than a
Planck length thick, we could not discern this other spatial set. Even
though it was right here in our spatial set.
Could this the explanation for dark matter?

Comments, please. Gordon