Not yet. Colossal Biosciences says its artificial egg system has hatched chickens, a result that could help with incubation research. It has not hatched a moa or shown that bringing one back is feasible. An incubation system addresses only one part of a much larger scientific and ethical challenge.
What Colossal’s artificial egg has demonstrated
On May 19, 2026, Colossal announced that 26 chickens had hatched using its system. The company describes a silicone-based membrane held by a lattice or rigid cup. It says the membrane permits gas exchange while retaining moisture, and that the system worked without supplemental oxygen. Those are company-reported claims, not results established in a peer-reviewed publication. National Geographic reported the announcement; Colossal’s announcement describes the company’s claims.
The reported process began with fertilized chicken eggs. Researchers opened them, transferred their contents into the artificial shell structure, and added calcium. The system therefore replaced the shell environment after fertilization; it did not create an embryo or replace all the biological components of an egg. Some experts describe it more precisely as an artificial eggshell or shell-less incubation system. National Geographic’s account explains the reported method.
Colossal says the design is compatible with standard incubators and can be adapted to different sizes. The sources do not establish that it works across other bird species or egg sizes. National Geographic also reported that Colossal had not released hatch rates for comparison with earlier methods, so the figure of 26 chicks is a hatch count, not a measure of success rate.
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Why that does not bring back a moa
The bird and the egg are different challenges
The South Island giant moa, Dinornis robustus, was an extinct New Zealand bird. Science Media Centre New Zealand describes it as extinct by the mid-15th century, making “600 years” a rounded description rather than an exact extinction date. Science Media Centre New Zealand’s expert commentary provides that dating.
Colossal estimates that a moa egg was about 80 times the volume of a chicken egg and about eight times that of an emu egg. These are company estimates, not settled measurements. They illustrate why an ordinary modern bird could not simply lay an egg large enough for a moa-sized embryo. A larger artificial shell might address incubation capacity, but it would not solve the other requirements for creating and developing a moa-like animal. Colossal’s announcement and National Geographic’s coverage report the estimates.
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Genetics, development and reproduction remain unresolved
A moa-like bird would require a suitable living relative, reconstructed and edited genetic material, methods to produce genetically altered birds, and incubation at the necessary scale. Researchers would also need evidence that any resulting animal could develop normally and remain healthy. The sources describe these as unfinished challenges, not capabilities demonstrated by the chicken hatchings.
Even if genetic engineering produced a bird resembling a moa, that would not mean the original extinct species had been restored. Dusko Ilic, Professor of Stem Cell Sciences at King’s College London, said recreating a moa would require accurate genome reconstruction and attention to development, physiology, behaviour, welfare and ecology; the result would likely be an engineered proxy. Science Media Centre New Zealand’s commentary reports his assessment.
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What the technology might mean for conservation
Experts have suggested possible uses such as rescuing compromised embryos, supporting captive breeding when natural eggs or surrogates are scarce, and providing access to developing embryos for research. These are potential applications, not demonstrated conservation outcomes for endangered species in the sources available.
Nic Rawlence, Associate Professor and Director of the Ancient Ecology Lab at the University of Otago, called the work impressive and said it could become a conservation tool, while noting that the announcement had no associated data or peer-reviewed publication. Philip Seddon, Professor Emeritus in the University of Otago’s Department of Zoology, cautioned that genetic modification of a near relative could create an ecological proxy, but could not resurrect a moa. Science Media Centre New Zealand reports their comments.
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What evidence would make the claim stronger?
The key question is not simply whether an artificial shell can support a hatch. To assess whether it could contribute to a moa project, readers would need evidence on several separate points:
- What was hatched, and whether development began in a fertilized egg rather than in the artificial system.
- Peer-reviewed performance data, including hatch rates and a comparison with existing incubation methods.
- Successful use beyond chickens, with evidence for different species and egg sizes.
- Whether the system can meet the scale and developmental needs proposed for moa eggs.
- Progress on genetic engineering, animal welfare, and whether any engineered bird could live appropriately in a changed ecosystem.
Until those questions are answered, the reported chicken hatchings are an engineering result with possible future relevance—not evidence that an extinct bird can now be brought back.
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