Domes are structurally sound, but creating one out of concrete is difficult, time consuming, and until now not very feasible. Architects from the Vienna University of Technology have created a type of concrete that inflates, and creates exactly shaped domes quickly and easily. The inflatable concrete shelters are made using cables and air cushions; a 9.5-foot dome only takes 2 hours to erect. | Read more about this new form of concrete on Discovery News