In the Terminator trilogy there was a robot that was composed out of some kind of metal. This robot was able to change shape, and even squeeze through tight holes. Currently researchers are working on a soft bodied robot that would be able to maneuver through openings smaller than its dimensions. Such robots could be used to a variety of missions, such as bomb disposal or other dangerous tasks. The robot that I read about is very small, about the size of a softball, and is still being developed. It would be great to have robots replace doing dangerous tasks, and I think that in the future even soldiers will be gradually replaced by machines.