This '4D' printing method could make packing for outer space much easier

These tiny objects made with 3D printers can dramatically expand when exposed to heat. Scientists have created a pair of compact, unfurling structures that could pave the way for innovations in biomedical devices or space exploration, where payloads can cost tens of thousands of dollars per pound. SEE ALSO: Start printing your breakfast with this pancake bot A team at the Georgia Institute of Technology crafted these objects using "tensegrity" — a structural system of floating rods in comp