Overview
- Colossal announced on Tuesday, May 19, 2026, that 26 live chicks hatched after researchers moved fertilized yolk, white and embryos into a 3D‑printed titanium lattice lined with a semipermeable silicone membrane and incubated them.
- The device mimics gas exchange of a natural shell and includes a transparent window for imaging, but Colossal manually supplemented calcium that would normally be leached from a natural eggshell.
- Independent scientists and ethicists say the result shows an engineered eggshell, not a fully synthetic egg, and they note the company has not provided peer‑reviewed data or independent verification of methods or long‑term chick health.
- Colossal plans to study the hatched birds, test larger sizes using emu and ostrich eggs as dry runs, and continue moa genome work as part of a multi‑step pathway it says could eventually scale to giant extinct birds.
- The advance builds on decades of shell‑less embryo culture experiments but leaves major biological hurdles—such as sourcing enough yolk for huge eggs and achieving precise genome editing—still unresolved for true de‑extinction or reintroduction.