  The range of the magnitude of the liquid viscosity as a function of the
temperature (T) is one of the most impressive of any physical property,
changing by approximately 17 orders of magnitude from its extrapolated value at
infinite temperature to that at the glass transition. We present experimental
measurements of containerlessly processed metallic liquids that reveal that the
ratio of the viscosity to its extrapolated infinite temperature value follows a
universal function of Tcoop/T. The temperature Tcoop corresponds to the onset
of cooperative motion and is strongly correlated with the glass transition
temperature. On average the extrapolated infinite temperature viscosity is
found to be nh, where h is Planck's constant and n is the particle number
density. A surprising universality in the viscosity of metallic liquids and its
relation to the glass transition is demonstrated.
