In a stunning scientific breakthrough, U.S.-based Colossal Biosciences has successfully produced three wolf pups—Romulus, Remus, and Khaleesi—that genetically resemble the extinct dire wolf, gone from Earth for over 13,000 years. Using advanced CRISPR gene-editing, scientists modified gray wolf DNA in 20 specific locations to include traits from ancient dire wolf fossils. These edited embryos were implanted into surrogate dogs, resulting in the birth of the pups.

Though not exact clones, the young wolves exhibit many dire wolf traits, including large frames, broad jaws, and pale fur. Weighing nearly 80 pounds at just a few months old, they are expected to grow up to 140 pounds. They now reside in a secure 2,000-acre sanctuary monitored by researchers.

Colossal Biosciences hails the births as a major milestone in “de-extinction,” with future projects targeting the woolly mammoth and dodo. Supporters, including Game of Thrones author George R.R. Martin, see it as a blend of science and magic. However, scientists urge caution, noting these animals can’t fulfill the ecological role of their extinct ancestors.

While excitement grows, the revival of Romulus, Remus, and Khaleesi opens up ethical questions about bringing back lost species—and how they might fit into today’s world.