Robots fold into action
Engineers at Harvard University in the USA have created a robot that folds itself into shape from a flat sheet, and is able to crawl.
The design is inspired by the Japanese art of origami, where coloured paper is folded to create objects.
The team say it could be developed to make devices that self-assemble in small spaces - such as war zones or in space exploration.
BBC reporter Victoria Gill explains how this special robot works.