  The common nature of the dark sector - dark energy and dark matter - as shown
in [1] follows readily from the consideration of generalized Newtonian
potential as a weak-field General Relativity. That generalized potential
satisfying the Newton's theorem on the equivalence of sphere's gravity and that
of a point-mass located in its center, contains an additional constant which
along with the gravitational constant is able to explain quantitatively both
the dark energy (cosmological constant) and dark matter. So, gravity is defined
not by one but two fundamental constants. We show that, the second constant is
dimensional-independent and matter-uncoupled and hence is even more universal
than the gravitational constant, thus affecting the strategy of observational
studies of dark energy and of the search of dark matter.
