While it might seem thrilling compared to your cubicle, working on the moon could prove to be just as drab and mundane a job in the long run. Chester Spell, a professor at the Rutgers School of Business, has done research that suggests the lunar settlements of tomorrow—and, for that matter, the space stations of today—could pose serious mental-health challenges for employees working in semi-isolation. Spell says that anxiety will likely be heightened in a lunar living space, and depression more apt to spread from one crew member to another. —Greg Mone

I often see, in representations of space stations and space vehicles,
a chamber that revolves or spins, producing artificial gravity. How is that possible? If the object is floating and the room starts spinning, it will simply spin around the object. Centrifugal force depends on gravity to work, doesn't it?

Paul Holtzheimer
Custer, Wash.