  We show that quantum gravity, whatever its ultra-violet completion might be,
could account for dark matter. Indeed, besides the massless gravitational field
recently observed in the form of gravitational waves, the spectrum of quantum
gravity contains two massive fields respectively of spin 2 and spin 0. If these
fields are long-lived, they could easily account for dark matter. In that case,
dark matter would be very light and only gravitationally coupled to the
standard model particles.
