Lin Yangting, one of the study's co-authors, said China's next two lunar missions-Chang'e 6 and Chang'e 7-hope to examine the content and distribution of lunar surface water at the same site in greater detail.
Military planning has been overhauled along with the way that NATO takes decisions. The hope is to provide more immediate, appropriate and flexible response to any future crisis.
Researchers at Duke University scrutinized more than 160 published studies and found an absence of strong evidence that any of these approaches can make a big difference.
This needs a more detailed examination than the others, both because it is less well understood and because it is particularly important in transmitting the effects of a change in the quantity of money.