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Colossal says its genetically edited wolf pups doubled in size from early measurements by mid-year, but the company’s available account does not provide the dates, figures, or measurement type needed to verify that comparison independently. Separately, Colossal reported that Romulus and Remus weighed over 90 pounds at six months and were 20% larger than gray wolves at the same developmental stage. Neither claim means the animals were twice the size of adult gray wolves.
What Colossal reported about their size
Colossal’s retrospective says the pups “had doubled their size” compared with early measurements by mid-year. The account does not state the early measurements, when they were taken, or whether “size” means mass, length, height, or another measure. Treat the doubling figure as a company-reported comparison, not a fully documented April-to-later weight ratio.
On a separate project page, Colossal reported that Romulus and Remus weighed over 90 pounds at six months and were 20% larger than gray wolves at the same developmental stage. That is a same-age comparison, not a comparison with adult gray wolves. The page does not provide the underlying sample or measurement method for the percentage.
| Claim | What the sources say | What it does not establish |
|---|---|---|
| “Doubled in size” | Colossal says the pups doubled from early measurements by mid-year. | The exact dates, baseline, metric, or a specific April-to-June ratio. |
| Over 90 pounds | Colossal reports Romulus and Remus weighed over 90 pounds at six months. | A weight for every pup or a comparison with adult wolves. |
| 20% larger | Colossal says the males were 20% larger than gray wolves at the same developmental stage. | That they were 20% larger than adult gray wolves, or the method behind the comparison. |
Why the comparison needs qualification
“Size” can mean mass, body length, height, or another measurement, and those comparisons are not interchangeable. Age and comparator matter too: a growing animal compared with its earlier measurements is not the same as a pup compared with a same-age gray wolf or an adult wolf.
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National Geographic describes dire wolves’ overall size as comparable to that of large gray wolves living in Alaska. That comparison concerns the extinct species and large modern wolves; it does not verify an exact size ratio for Colossal’s animals.
What does “dire wolf” mean in this case?
Colossal presents the animals as dire wolves. UC Santa Cruz describes them as genetically modified gray wolves, not exact replicas of dire-wolf ancestors. The pups carry selected edits intended to produce traits associated with the extinct animal.
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The Associated Press reports that Colossal used CRISPR to edit gray-wolf cells at 20 sites, then transferred embryos using domestic-dog egg cells and surrogates. This is different from recreating and inserting an intact dire-wolf genome.
Ancient-DNA research places dire wolves on a lineage distinct from modern gray wolves, with divergence around five million years ago and a closer relationship to African jackals. National Geographic also describes anatomical differences, including skull crests and robust teeth. A careful description is therefore genetically edited gray-wolf-derived animals that Colossal calls dire wolves—not exact copies of the extinct species.
How to interpret the growth claims
- Attribute the doubling claim: Colossal’s retrospective says the pups doubled in size from early measurements by mid-year.
- Do not assume the baseline: The available account does not identify the early measurements or establish that they were taken in April.
- Keep the metric clear: The source does not specify whether “size” means mass, length, height, or another measure.
- Keep the comparators separate: The 20% figure is Colossal’s comparison with gray wolves at the same developmental stage, not with adult wolves.
- Distinguish company claims from independent verification: The cited company pages do not provide enough detail to reconstruct the exact ratios independently.
FAQ
How big are Colossal’s dire wolf pups?
Colossal reports that Romulus and Remus weighed over 90 pounds at six months. That is a company-reported figure; the project page does not provide the underlying measurement method.
Were the pups really more than twice as big as they were in April?
The available sources do not establish that exact comparison. Colossal’s retrospective says the pups doubled in size from early measurements by mid-year, but it does not give the dates, measurements, or metric needed to confirm an April baseline.
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Are Colossal’s animals bigger than adult gray wolves?
The cited sources do not support that conclusion. Colossal’s 20% comparison is with gray wolves at the same developmental stage, while National Geographic says dire wolves’ overall size was comparable to that of large gray wolves in Alaska.
Are Colossal’s animals exact copies of dire wolves?
No. UC Santa Cruz describes them as genetically modified gray wolves, not exact replicas. The Associated Press reports CRISPR edits at 20 sites in gray-wolf cells.
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