"4D, most known in science fiction and theoretical physics, is being actualized by the 4D printing technology developed at MIT’s Self-Assembly Lab. This breakthrough enhances conventional 3D printing techniques by adding time as a dimension. When a time-variant figure 3D printed object can remain stationary, the 4D printed object dynamically changes with the presence of certain stimuli ushering in a new direction in materials science and engineering."
https://www.ecoticias.com/en/first-object-4-dimensions-printed/8426/
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