KAMUELA, Hawaii — With data collected from the mighty W. M. Keck Observatory, California Institute
of Technology (Caltech) astronomer Mike Brown — known as the Pluto killer for discovering a Kuiper - belt object that led to the demotion
of Pluto from planetary status — and Kevin Hand from the
Jet Propulsion Laboratory (JPL) have found the
strongest evidence yet that salty
water from the vast liquid ocean beneath Europa's frozen exterior actually makes its way to the surface.