What is 4D Printing?

Since the late 1970s, 3D printing has advanced in sophistication and Skylar Tibbits is pioneering the next evolution, which he refers to as 4D printing, with time as the fourth dimension. This developing technology will enable us to print objects that will eventually self-reshape or self-assemble. Consider a printed cube that folds in front of your eyes or a printed pipe that is capable of sensing when it needs to expand or contract.