Colossal Biosciences claims it has engineered artificial eggshells that could enable the resurrection of the moa, massive extinct flightless birds from New Zealand. The company, which previously announced efforts to revive the dire wolf through genetic engineering, says the synthetic shells represent a breakthrough toward recreating these giants.
The moa stood up to 3.6 meters tall and laid eggs weighing up to 6 kilograms. Colossal's artificial shells aim to replicate the structural properties and gas exchange needed to incubate moa embryos in laboratory conditions, potentially bypassing the need for a living surrogate species.
However, independent scientists express skepticism about whether eggshells alone solve the de-extinction puzzle. Creating viable moa embryos requires far more than a container. Researchers must navigate complex genetic gaps between the moa's genome and available DNA sources, resolve developmental biology questions about how ancient bird embryos would grow, and identify fundamental physiological requirements of the extinct species.
The moa vanished roughly 600 years ago, likely due to human hunting and habitat loss. While fragmentary DNA exists in museum specimens, assembling a complete functional genome remains technically daunting. Even if Colossal successfully develops embryonic tissue, gestating it in an artificial shell does not address whether the resulting bird could survive post-hatch.
Colossal has marketed de-extinction as imminent through bold public statements, though the dire wolf project remains in preclinical stages. The company's eggshell advancement represents one incremental technical step in an enormously complex undertaking spanning genetics, developmental biology, and animal husbandry.
Independent experts note that reviving the moa would require solving multiple interconnected problems simultaneously. An artificial eggshell handles one narrow piece. Whether such efforts ultimately produce a living moa, however, remains speculative