Colossal Marks Dire Wolves' First Birthday

Colossal Biosciences celebrated the one-year anniversary of Romulus and Remus, who were born Oct. 1, 2024, and said their sister Khaleesi arrived in January 2025. The company says it reconstructed a dire wolf genome from a ~13,000-year-old tooth and a ~72,000-year-old skull and used roughly 20 precision germline edits on gray wolves, producing pups via surrogate dogs. At age one the males weigh about 115–140 pounds, eat more than five pounds of meat daily, are developing hunting instincts, and are expected to continue growing for another year or two. The animals live on a 2,000+‑acre ecological preserve with round‑the‑clock monitoring and a full veterinary and care staff, and Colossal plans to grow the group into a pack of up to eight. To mark the milestone Colossal released a colorful music video and anthem titled 'Happy Birthday Dire Wolf' by Stan Bush and Lenny Macaluso and treated the wolves to a custom celebratory cake. The company is presenting the animals' survival and development as a major scientific and conservation milestone as it continues de‑extinction work.