  Cosmic internal symmetry (COINS) relates cosmic vacuum, dark matter, baryons
and radiation, in a finite universe. Evidence for COINS comes from the
concordance data, including the WMAP data. COINS is behind 1)the cosmic
coincidence, 2)the spatial flatness, 3)cosmic entropy, 4)initial amplitude of
cosmic perturbations. COINS suggests also a solution to the naturalnes problem.
COINS is due to the electroweak-scale physics or multi-dimension physics, if
macroscopic extra dimensions really exist.
