Colossal’s Dire Wolf Pups and the De-Extinction Ethics Debate
Why in the news
A US biotech firm drew attention for claiming to bring back a dire wolf, sparking debate over whether such de-extinction is real science or a costly distraction.
Key facts
- Company: Colossal Biosciences (USA), led by Harvard geneticist George Church.
- Flagship goal: revive the woolly mammoth to help fight climate change by restoring Arctic tundra.
- Method: ancient DNA from fossils plus CRISPR-Cas9 edits to a living relative’s genome.
- Mammoth plan: a mammoth-elephant hybrid embryo carried by a surrogate elephant.
Dire wolf project at a glance
| Step | Detail |
|---|---|
| Extinct species | Dire wolf (Aenocyon dirus), gone about 11,000 years ago |
| Closest living relative | Gray wolf (Canis lupus) |
| Ancient DNA source | A tooth aged 13,000 years plus an ear bone aged 72,000 years |
| Embryos | 45 implanted into two domestic dogs |
| Births | Romulus and Remus first, then Khaleesi |
| Outcome | 99.5% gray wolf DNA; white coats, muscular build, stronger jaws |
Climate argument
- Supporters say mammoths could restore Pleistocene grasslands that reflect more sunlight and limit methane from thawing permafrost.
- Siberian trials with cold-hardy animals show partial rewilding success.
Concerns
- No rigorous peer validation; the scientific community is sceptical.
- Millions spent on speculative projects draw attention and money away from the extinction crisis caused by deforestation, urbanisation and habitat loss.
- Gene editing for non-medical use needs strict guidelines; He Jiankui’s embryo editing is cited as a warning.
Exam angle
- Technology: CRISPR-Cas9; field: genome engineering and synthetic biology.
- Species targeted: woolly mammoth and dire wolf.
- Controversial scientist cited: He Jiankui.