Study suggests ice on lunar south pole may have more than one source
(PHYSorg.com Space & Earth)

The discovery of ice deposits in craters scattered across the Moon`s south pole has helped to renew interest in exploring the lunar surface, but no one is sure exactly when or how that ice got there. A new study published in the journal Icarus suggests that while a majority of those deposits are likely billions of years old, some may be much more recent.