Could you imagine if the walls of your workplace could stiffen and stretch as a response to earthquakes or shifting loads? What if your water pipes at home could change their shape to accommodate the varying rates of water flows? Or what if a table could assemble itself when you touch it?

This is the idea behind 4D printing, a process where 3d-printed objects transform in response to external environmental stimuli, such as heat, wind, water, and other forms of energy. 4D creates objects that can alter their shapes and perhaps even their functions over time.

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