It's certainly handy to know how fast gears or wheels are spinning, but equipping them with external sensors may affect their performance. That's why scientists have devised a method of 3D-printing wireless sensors right into the things.

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Calcium carbonate is an impressive material, in that it combines strength, light weight and porosity. Scientists have devised a new bacteria-based method of 3D-printing the substance, for uses such as bone repair and coral reef restoration.

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While multi-material 3D printers do already exist, the filament they extrude is all one material at any one point in the printing process. A new system produces actual multi-material filaments, however, and they boast a very useful helical design.

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3D printing technology is used not only to build things as large as houses, but also as small as snowflakes. A new material allows the latter to be much stronger than ever before, and to be printed considerably faster.

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While 3D printing technology does allow complex metal parts to be produced efficiently, such items often deform when stressed and heated. That may soon no longer be the case, however, thanks to a new technique developed at MIT.

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Scientists have developed a new method of providing information on 3D-printed foods, by printing a QR code within the food itself. Doing so doesn't affect the taste or outward appearance of the food, nor does it require the use of any labels.

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Researchers at EPFL have demonstrated a light-based 3D-printing method that's about 30 times faster than conventional additive manufacturing, creating objects in 20 seconds that would normally take more like 10 minutes thanks to photocurable resins.

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A team of Dutch scientists has taken on the grueling task of designing the perfect piece of chocolate, using novel 3D printing techniques to create designs that shatter in the most pleasurable way when bitten. Clearly, extensive testing is required.

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If you're 3D-printing metal parts for use in aircraft or other critical systems, then those parts had better not be defective. A new system allows such items to be checked for structural flaws, quicker and cheaper than ever before.

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Barcode stickers may provide valuable information on products, but they're rather unsightly, and they peel off over time. An experimental new alternative, however, is 3D-printed right into the item, and is invisible to the naked eye.

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