The moon may have enough power for massive cities. There’s just one problem

There’s a sea of ice lurking on the dark side of the moon, but even that may not be enough to quench the thirst of a future lunar colony. Moon colonies have long been fodder for science fiction, but governments and private companies are racing now to make those extraplanetary dreams a reality. The main catch? Like the plot of every good hard sci-fi tale of humans in space, success hinges on the day-to-day drudgery of resource management. On the moon, water is that vital resource, mad...