Kinematics of Spiral galaxies as a Portal to the Nature of Dark Matter
  The gravitational field of Spiral galaxies is well traced by their rotation
curves. Only recently it has become of extreme interest that the latter form a
family ruled by two parameters of the {\it luminous} component: the disk
length-scale $R_D$ and the magnitude $M_I$. This evidence is so strong and
consequential that it must be taken as the starting point for the investigation
on the issue of the dark matter in galaxies. The emerging fact is that
structural quantities deeply rooted in the luminous components, like the disk
length scales are found to tightly correlate with structural quantities deeply
rooted in the dark component, like the DM halo core radii. This unexpected
evidence may strongly call for a shift of paradigm with respect to the current
Cold collisionless Dark Matter one.
