The British Interplanetary Society is used to sounding far-fetched. In the 1930s, they came up with head-scratching plans for a multi-stage rocket and lunar lander (quite similar to the 1969 machinery that first made it to the moon). Now, BIS is focused on a new scheme: the free-floating, solar-powered space colony. Think lush landscapes, a water cycle, a menagerie and artificial gravity. For materials, they’d mine their stopping-off point: the moon. While it sounds too utopian to be feasible, we may have to hope it’s doable, for future generations’ sake.