They were gone before the pyramids were built. Before Stonehenge. Before writing. Now, 10,000 years after the last dire wolf walked the Earth, three of them — Romulus, Remus, and Khaleesi — are fully grown, living as a pack, and hunting together on a 2,000-acre reserve.
Colossal Biosciences, the de-extinction company, announced in February 2026 that the world's first bioengineered dire wolves have passed their first annual health exams, matured to full size, and are now operating as a genuine pack — playing, eating together, and pursuing prey including deer.
> *'They're doing everything we hoped they'd do. They've mastered bunnies, and now they're going after bigger game.'* > — Matt James, Chief Animal Officer, Colossal Biosciences
**How They Did It**
The story began with ancient DNA. Colossal scientists extracted genetic material from fossilised dire wolf (*Aenocyon dirus*) remains — bones and teeth preserved for tens of thousands of years. They then sequenced this ancient genome and identified the key genetic differences between dire wolves and their closest living relatives, grey wolves.
Using CRISPR gene editing, the team made targeted edits to grey wolf embryos — altering around 20 genes responsible for the dire wolf's distinctive traits: its considerably larger size, its heavier, more robust skull and jaw designed for crushing bone, and its thick, pale coat adapted to Ice Age climates.
The result: three animals that carry the genetic signature of a creature absent from the planet since the Pleistocene. Romulus and Remus (male) and Khaleesi (female) were born in 2025. By early 2026, they had reached full maturity — larger and heavier than any grey wolf alive today.
**What 'De-Extinction' Really Means**
Science is honest about the limits here. Colossal's own chief scientist, Beth Shapiro, describes the animals as 'grey wolves with targeted edits' — acknowledging that creating a perfect genomic copy of an extinct species is, at present, impossible. But beyond the nuance, the gene-editing tools developed for this project are now being refined for conservation of living threatened species.
Romulus, Remus, and Khaleesi live on a protected, managed 2,000-acre site with an expert care team. They choose where to roam, what to hunt, and when to rest. Their diet has evolved with them: from manageable prey to pursuing deer.
Whether you call them 'dire wolves' or 'genetically engineered wolves with dire wolf traits,' the fact that they are healthy, maturing, pack-living, and hunting in 2026 is a milestone nobody would have bet money on ten years ago.
The next time someone asks 'Is it too late to bring things back?' — Romulus, Remus, and Khaleesi are a pretty compelling answer. 🐺
*Sources: Colossal Biosciences · Screen Rant (Feb 2026) · National Today (Feb 22, 2026)*