Focus: Manufacturing and Material Science We’ve all heard of 3D printing, but the 4IR is ushering in 4D printing, where the fourth dimension is time. Scientists are now creating "smart materials" that can change their shape or properties in response to external stimuli like heat, water, or electricity. Imagine a water pipe that can expand or contract based on pressure, or a bridge that can "heal" its own cracks. This shift moves manufacturing away from massive, centralized factories and toward localized, on-demand production. It reduces waste, slashes shipping emissions, and allows for levels of customization previously thought impossible. In the 4IR, the factory isn't a building—it's a printer sitting on your desk or in your local community hub.
