- Scientists are developing expandable habitats that would be inflated in space
- Bigelow's Expandable Activity Module (BEAM) prototype is attached to the International Space Station
- BEAM adds space -- about the size of a bedroom -- to the orbiting research lab
(CNN)In sci-fi movies, space habitats are huge structures with labyrinth layouts. But Hollywood doesn't have to deal with the issues real aerospace engineers face when contemplating future space homes -- such as gravity and financial constraints.