Scientists at Colossal Biosciences announced that they have successfully hatched live chicks from a fully artificial egg, an achievement that could accelerate efforts to resurrect extinct birds such as the South Island giant moa. the breakthrough involved a 3‑D‑printed, shell‑less incubation system that mimics natural eggs and allowed embryos to develop for 18 days before hatching.

18‑Day Incubation in a 3‑D‑Printed Lattice Egg

The team placed early‑stage bird embryos into a silicone‑lined, lattice‑structured shell that provides protection while permitting oxygen diffusion. over an 18‑day period, the embryos grew inside the device, which features a transparent “window” for real‑time monitoring. According to the company’s release,the chicks emerged healthy and active , demonstrating that the artificial environment can support full embryonic development.

Colossal’s Goal to Resurrect the 11.8‑Foot Moa

Colossal Biosciences cited the hatch as a “critical milestone” for its plan to bring back the South Island giant moa, a bird that stood 3.6 metres tall and weighed about 230 kg. The firm argues that mastering shell‑less incubation is a prerequisite for scaling up to the massive eggs that extinct megafauna would have required. If the technology can be adapted to larger egg sizes, it could serve as a stepping stone toward an artificial womb for fully de‑extinct species.

Engineering the First Oxygen‑Permeable Artificial Egg

Previous artificial‑egg attempts over the past four decades relied on high‑pressure oxygen, which damaged DNA and harmed long‑term health. Colossal’s design uses a silicone membrane that lets atmospheric oxygen pass naturally, replicating the microscopic pores of real eggshells. As the company noted, this solves “the core engineering problem of artificial eggs” and makes the device compatible with standard commercial incubators.

Who Still Holds the Key Questions?

While the hatch proves the concept, experts ask whether the system can support the longer gestation periods and larger metabolic needs of extinct megafauna. Additionally, the ethical and ecological implications of de‑extinction remain unresolved , and no independent laboratory has yet replicated the results.. As the report says, the breakthrough “changes everything,” but the path to a living moa or mammoth is still uncertain.