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No, the dire wolf has not been brought back from extinction

Colossal Biosciences claims three pups born recently are dire wolves, but they are actually grey wolves with genetic edits intended to make them resemble the lost species

By Michael Le Page

7 April 2025

×îÐÂÂé¶¹ÊÓÆµ. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

Romulus and Remus are genetically modified grey wolves

Colossal Biosciences

A company called Colossal Biosciences says it has revived an extinct species – the dire wolf. “On October 1, 2024, for the first time in human history, Colossal successfully restored a once-eradicated species through the science of de-extinction. After a 10,000+ year absence, our team is proud to return the dire wolf to its rightful place in the ecosystem.” That’s the claim made on the website of the US-based company. Here’s what we know.

What’s happened?

Colossal is claiming…

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