Life aboard the International Space Station (ISS) may sound like the ultimate SciFi adventure. Just imagine floating through the modules, gazing down on Earth from 400 kilometers above, and conducting experiments in the vacuum of space. The ISS is a fragile environment, a habitat carefully engineered to sustain human life in one of the most hostile environments imaginable. That means certain activities that are perfectly normal on Earth are strictly forbidden in space. Far from making space dull, these restrictions highlight just how unique life on the ISS really is.