Those Weren't Dire Wolves, Scientists Say — Just Edited Grey Wolves

Dire wolves died out more than 10,000 years ago, and their world went with them. The climate, the food sources, the predators, the whole web of ecological relationships — none of it exists today. That gap is a second break, the researchers say, and it makes the extinction permanent regardless of what's in the lab.

"A reconstructed genome, even if highly accurate, represents at most a partial snapshot of an individual organism," they write. Not a species. One individual's code, frozen in time.

What does this change for de-extinction claims?

For a start, vocabulary. Davinack and Daniels aren't calling for the science to stop. They concede the genetic engineering itself has merit, and they note that many scientists already avoid the word "de-extinction" when it doesn't fit. Their target is private companies and media outlets that lean on the term anyway, because overselling muddies the context in which real progress gets judged.

"Greater precision in terminology therefore has practical consequences," they write. "Lineage restoration, genetic recovery, phenotypic reconstruction, ecological substitution and restoration of historical communities are distinct objectives and require different criteria of success."

Each of those is a different project. Each succeeds or fails by different measures. Calling them all "de-extinction" flattens the distinction.

Is de-extinction ever possible?

The researchers stop short of declaring it impossible. Their objection is narrower: the dire wolf case doesn't qualify. A stronger route, they suggest, runs through preserved cells or preserved embryos, which solve some of the continuity problems and offer what they call "biological continuity" — an unbroken physical link to the extinct population.

There's a precedent, of a sort. In 2003, scientists used preserved cells in an attempt to bring back the Pyrenean ibex. The animal didn't survive. But by the paper's logic, that failed attempt has a stronger claim to the word "de-extinction" than 2025's wolf headlines do.

"Genomic reconstruction may recreate selected traits or produce ecological proxies, but it cannot recover extinct species as historically continuous evolutionary lineages," the researchers write.

So the bottom line is blunt. What happened in 2025 was sophisticated genetic engineering applied to a living species, not the resurrection of a dead one. The dire wolf, for now, stays extinct. Anyone who tells you otherwise, two biologists from Massachusetts would like a word about your terminology.