New evidence for dark matter
  We present a new universal relation, satisfied by matter distributions at all
observed scales, and show its amazingly good and detailed agreement with the
predictions of the most up-to-date pure dark matter simulations of structure
formation in the Universe. This work extends the previous analysis [0904.4054;
0909.5203] to a larger range of masses, demonstrates a different scaling law,
and compares it with numerical simulations. This behaviour seems to be
insensitive to the complicated feedback of baryons on dark matter. Therefore,
it potentially allows to compare theoretical predictions directly with
observations, thus providing a new tool to constrain the properties of dark
matter. Such a universal property, observed in structures of all sizes (from
dwarf spheroidal galaxies to galaxy clusters), is difficult to explain without
dark matter, thus providing new evidence for its existence.
