Through several articles we have developed a model for dark matter as
consisting of bubbles of a new (speculated) type of vacuum, starting from
cm-sized pearls or balls down to atomic size ones and now we believe they
have nanometer sizes. In the latest development of our model we have the
bubbles of the new vacuum imbedded in dust grains very similar to the
grains present in interstellar and intergalactic space anyway, although the
presence of the bubble with a very large homolumo gap in its single electron
spectrum influences the dust grain material so as to become denser and harder.

We have earlier explained how our dark matter particles get stopped in the
shielding, so that normally expected nucleonic collisions are not observable.
The signal of the dark matter in the underground experiments
rather becomes decays of excited
particles actually with the energy of the homolumo gap, which is also
equal to the photon energy of the
X-ray line presumably observed astronomically from galaxy clusters etc.

A new calculation here is a fitting of the
velocity dependence of the dark matter self-interaction as estimated by
Correa \cite{CAC}, using deviations from the only
gravitationally interacting dark matter in dwarf galaxies.

Let us stress that apart from the speculated new vacuum we have
no new physics,
and if the couplings in the Standard Model were adjusted to make degenerate
vacua as speculated according to our Multiple Point
%(Criticality)
Principle (MPP) we would only need the Standard Model, so dark matter would
{\em not} require new physics.