Ten thousand years ago, the dire wolf ruled the North American plains. More massive than the modern gray wolf, this formidable predator vanished alongside most of the Ice Age megafauna. Today, a team of scientists is trying to give it back shape — or at least its appearance — through genetic editing.
The stars of this bold wager? Romulus, Remus, and Khaleesi, three wolf pups raised by Colossal Biosciences, a company specializing in de-extinction technologies. At six months, the first two already weigh about 20% more than a standard gray wolf, surpassing 40 kg. Their younger sister, still smaller, is also growing well above average.
Dire wolves, but not quite
Despite their name and appearance, these animals are not true dire wolves. Technically, it is currently impossible to clone an extinct species because DNA is not sufficiently intact. What Colossal has achieved is a genetic reinterpretation: from gray wolf embryos, researchers modified 14 genes to give them physical traits similar to Canis dirus.
The stated aim isn’t pure reconstruction, but the development of technologies capable of aiding the conservation of threatened species. For some experts, such as paleogeneticist Nic Rawlence, talking about “de-extinction” remains an overreach. But at Colossal, this approach is framed as a tool in the service of living beings.
A springboard for saving living species
And this isn’t just a media stunt. Alongside the dire wolves, Colossal has announced the birth of four genuine red wolves, an endangered species with barely around twenty individuals left in the wild. Unlike the modified wolf pups, these clones — named Hope, Blaze, Cinder and Ash — are genetically identical to the original species, cloned from carefully preserved founder lineages.
Result: a 25% gain in genetic diversity for a seriously threatened species, a rare victory in the field of conservation.
The North White Rhinoceros in the spotlight
Another ambitious project: saving the North White Rhinoceros, of which only two females remain capable of reproduction. By using frozen eggs and sperm, and developing viable embryos, Colossal hopes to recreate individuals and implant them into females of the South’s sister species.
This kind of effort, combining biotechnology, conservation, and innovation, could well redefine how we fight against extinctions. Even as some voices voice concerns about the ethical and ecological risks of such an approach.
