New Scientist Breaking News - Robot builder could 'print' houses: "A robot for 'printing' houses is to be trialled by the construction industry. It takes instructions directly from an architect's computerised drawings and then squirts successive layers of concrete on top of one other to build up vertical walls and domed roofs.
The precision automaton could revolutionise building sites. It can work round the clock, in darkness and without tea breaks. It needs only power and a constant feed of semi-liquid construction material."
This type of automated construction technique could be vital to a space colonizations effort. Many of the hazards of construction on Earth can be avoided. Those hazards are multiplied in an environment exposed to hard vacuum and radiation.