why it matters: they printed a plastic 3D egg with a 3D printer and it was printed around a chicken embryohttps://www.technologyreview.com/2026/05/19/1137471/colossal-biosciences-is-growing-chickens-in-a-3d-printed-container/chickens survived growing inside plastic egg and because it is not hard plastic they were able to break free from the egg once ready to hatchThe biotech company today claimed it has developed a "fully artificial egg" as part of its effort to resurrect extinct avian species, including birds like the dodo and the giant moa. But "artificial eggshell" would probably be a better description for the invention. They have only grown chicken inside it as a test measure.The plastic egg has a special silicone-based membrane that lets in oxygen, just as a real eggshell does. This is because embryos actually need to breathe.Egg is transparent:"To see them all moving around in their artificial eggs was absolutely mind blowing," says Pekka Paska, the company's chief biology officer. "You really feel you can grow life outside of the womb.''In order to actually create a moa, Colossal will have to genetically alter another type of bird, changing potentially thousands of DNA letters. But so far, chickens are the only bird species that can be genetically engineered. And that's via a tricky process of editing stem cells that produce egg and sperm. Scientists have to add or delete DNA letters from these cells and then inject them back into an egg. The resulting bird will carry the genetic changes in its gonads -- and then be able to pass them on.
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