Colossal Biosciences, a biotechnology firm based in Texas, has announced the birth of three dire wolf pups, marking a significant development in genetic engineering and de-extinction efforts. The pups, named Romulus, Remus, and Khaleesi, were born in late 2024 and early 2025, and the company claims to have successfully revived a species that has been extinct for approximately 13,000 years.
The genetic engineering process involved extracting DNA from a 13,000-year-old tooth and a 72,000-year-old skull. Using a technique called somatic cell nuclear transfer, the team cloned high-quality cell lines, which were then implanted into donor egg cells and carried to term by a surrogate. Colossal CEO Ben Lamm highlighted the potential implications of this work for conservation efforts, stating, "any sufficiently advanced technology is indistinguishable from magic."
The dire wolf, known for its prominence in Ice Age North America, is often associated with popular culture due to its portrayal in the HBO series “Game of Thrones.” The announcement has generated a range of reactions online, with some expressing excitement over the revival, while others remain skeptical. Critics argue that the animals produced are not true dire wolves but genetically modified gray wolves with certain dire wolf traits. Some commentators have raised ethical questions about the motivations behind such genetic interventions.
Colossal Biosciences has previously made headlines for engineering a “woolly mouse” by injecting mammoth DNA into mice, with ambitions to bring the woolly mammoth back by 2028. The company’s work continues to spark discussions about the future of genetic engineering and its role in conservation and species revival.