Colossal Biosciences announced Monday that its bioengineered dire wolves have reached full maturity and are now capable of reproducing.

This development marks a significant milestone in de-extinction technology, suggesting that extinct species could potentially be integrated back into modern ecosystems. The ability to breed would allow the company to establish a self-sustaining population rather than relying on individual laboratory creations.

The Dallas-based biotechnology company, which is valued at $10.2 billion [3], said that three revived dire wolves are now fully grown [4]. According to the company, these animals are currently hunting together as a pack [4]. Colossal Biosciences said the project aims to demonstrate its technology and advance conservation-oriented biotechnology.

Dire wolves have been extinct for a significant period, though sources differ on the exact timeline. Some reports state they have been gone for over 10,000 years [1], while others indicate the period exceeds 12,000 years [2].

Despite the company's claims, the project has faced scrutiny from the scientific community. Critics said the animals are not a truly revived species but are instead genetically modified gray wolves. The debate centers on whether the bioengineered traits are sufficient to classify the animals as the extinct species or if they are simply modern proxies with ancestral characteristics.

Colossal Biosciences has not released detailed genetic data to address these criticisms. However, the company continues to position the achievement as a breakthrough in the effort to reverse extinction and restore lost biodiversity.

“Three revived dire wolves are now fully grown and hunting together as a pack”

The transition from laboratory success to reproductive maturity shifts the conversation from theoretical genetics to ecological impact. If these animals are truly capable of breeding, the focus will move toward the ethical and environmental risks of introducing a prehistoric apex predator into a modern landscape that has evolved without them for millennia.