For the first time in more than 10,000 years, the howl of something remarkably similar to a dire wolf echoes again. In a secure, undisclosed location in the United States, three wolf pups are bringing a piece of the Ice Age back to life.
A Glimpse Into the Past
These aren’t ordinary wolves. Genetically engineered by Colossal Biosciences, a Dallas-based biotech company, these pups have been designed to closely resemble the long-extinct dire wolves — powerful prehistoric predators that once roamed North America.
Weighing in at around 80 pounds already (with an expected adult weight of 140 pounds), the pups sport long white fur and strong, muscular jaws — features that resemble what scientists believe dire wolves looked like before they disappeared over 10,000 years ago.
Meet the Pups: Romulus, Remus, and Khaleesi
The company has affectionately named two of the pups Romulus and Remus, after the legendary twin founders of Rome. They were born on October 1, 2024. The third pup, born a few months later on January 31, 2025, is named Khaleesi, a nod to the powerful wolves from the Game of Thrones series.
Dire Wolves Reborn
Recreating Dire Wolves Using Ancient DNA
To bring these wolf-like creatures into the modern world, scientists turned to ancient history. They studied fossilized remains, including a 13,000-year-old tooth from Ohio and a 72,000-year-old skull fragment from Idaho.
With this information, researchers identified the key genetic traits that made dire wolves unique. Using CRISPR gene-editing technology, they modified 20 specific areas in gray wolf DNA to match those ancient traits.
From Lab to Life: The Birth of a Modern Dire Wolf
Once the DNA was modified, it was inserted into egg cells from domestic dogs. The embryos were then implanted into surrogate mother dogs. Just over two months later, the genetically engineered wolf pups were born, marking a huge milestone in biotechnology and conservation science.
Not Their First Rodeo: Colossal’s Other De-Extinction Projects
This isn’t the first time Colossal Biosciences has made headlines. The company is also working on bringing back other extinct species like the woolly mammoth and the dodo, using similar gene-editing and cloning techniques.
