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4D-printed beetle that changes color when it gets wetter
4D-printed beetle that changes color when it gets wetter,3D printing has become mainstream. For a few hundred euros you can buy a 3D printer online. But what about 4D printing? How do you print an object

4D-printed beetle that changes color when it gets wetter

3D printing has become mainstream. For a few hundred euros you can buy a 3D printer online. But what about 4D printing? How do you print an object