  We provide further details on a recent proposal addressing the nature of the
dark sectors in cosmology and demonstrate that all current observations related
to Dark Matter can be explained by the presence of a heavy spin-2 particle.
Massive spin-2 fields and their gravitational interactions are uniquely
described by ghost-free bimetric theory, which is a minimal and natural
extension of General Relativity. In this setup, the largeness of the physical
Planck mass is naturally related to extremely weak couplings of the heavy
spin-2 field to baryonic matter and therefore explains the absence of signals
in experiments dedicated to Dark Matter searches. It also ensures the
phenomenological viability of our model as we confirm by comparing it with
cosmological and local tests of gravity. At the same time, the spin-2 field
possesses standard gravitational interactions and it decays universally into
all Standard Model fields but not into massless gravitons. Matching the
measured DM abundance together with the requirement of stability constrains the
spin-2 mass to be in the 1 to 100 TeV range.
