  Using recent precision measurements of cosmological paramters, we re-examine
whether these observations alone, independent of type Ia supernova surveys, are
sufficient to imply the existence of dark energy. We find that best
measurements of the age of the universe $t_0$, the Hubble parameter $H_0$ and
the matter fraction $\Omega_m$ strongly favor an equation of state defined by
($w < -1/3$). This result is consistent with the existence of a repulsive,
acceleration-causing component of energy if the universe is nearly flat.
