The Next Species in Line for Colossal’s De-Extinction
The successful resurrection of dire wolves validates de-extinction technology while opening possibilities for restoring other lost species. Colossal Biosciences has already identified several candidates for future de-extinction efforts, each presenting unique scientific challenges and conservation opportunities that build upon lessons learned from the dire wolf achievement.
The woolly mammoth represents Colossal’s most ambitious ongoing de-extinction project, with the company aiming for mammoth birth by 2028. The project has already demonstrated significant progress through the creation of 38 “woolly mice”—laboratory mice edited with mammoth genes to grow shaggy coats. This proof-of-concept work validates the genetic engineering approaches while testing mammoth gene function in living mammals.
The mammoth project presents greater complexity than dire wolf de-extinction due to the species’ larger size, longer gestation period, and more extensive genetic modifications required. Researchers must edit Asian elephant genomes to express mammoth characteristics including cold adaptation, fat metabolism, specialized blood proteins, and the iconic woolly coat. The scale of genetic modifications required exceeds even the 20 edits accomplished in dire wolves.
Surrogate pregnancy logistics for mammoths present unique challenges. Asian elephants, the closest living mammoth relatives, have 22-month gestation periods and significant ethical considerations around using endangered elephants as surrogates. Colossal plans to develop artificial wombs or explore other reproductive technologies to avoid placing additional stress on endangered elephant populations.
The ecological implications of mammoth de-extinction extend beyond species recovery to potential ecosystem restoration. Woolly mammoths could potentially help restore Arctic grasslands by converting tundra back to steppe ecosystems, potentially slowing permafrost melting and reducing greenhouse gas emissions. This ecosystem engineering potential gives mammoth de-extinction climate change mitigation benefits.
The Tasmanian tiger, or thylacine, represents another high-priority de-extinction target with unique characteristics that differentiate it from both dire wolves and mammoths. As a marsupial predator that went extinct in 1936, thylacines present relatively recent extinction timelines that may preserve higher-quality genetic material while offering opportunities to study more recent extinction processes.
Thylacine de-extinction faces the challenge of marsupial reproductive biology, which differs significantly from placental mammal reproduction used in dire wolf and mammoth projects. Marsupials have unique developmental patterns, with young born at extremely early developmental stages and completing development in pouches. These reproductive differences require developing new techniques for marsupial de-extinction.
The dodo represents a completely different category of de-extinction candidate, being a flightless bird species extinct since the 17th century. Avian de-extinction presents unique challenges including egg-based reproduction, specialized metabolic requirements, and complex behavioral patterns. Bird de-extinction would require developing new reproductive technologies adapted to avian biology.
Genetic material availability varies significantly among de-extinction candidates. Recent extinctions like the thylacine and dodo may have better-preserved specimens, while older extinctions like mammoths require working with more degraded ancient DNA. The dire wolf project’s success with 72,000-year-old genetic material expands the temporal range of potential de-extinction candidates.
The passenger pigeon represents another avian de-extinction candidate with significant ecological and historical significance. Once the most abundant bird in North America, passenger pigeons went extinct in 1914 due to overhunting and habitat loss. Their restoration could potentially help reestablish forest ecosystems while addressing a clear case of human-caused extinction.
Technical challenges vary among different de-extinction candidates based on their biology, extinction timeline, and available genetic material. Each species requires developing specialized approaches to genetic modification, reproductive biology, and species-specific care protocols. The dire wolves provide a foundation, but each new species presents unique requirements.
Conservation benefits assessment guides prioritization among potential de-extinction candidates. Species that could provide ecosystem services, support existing conservation efforts, or restore ecological functions receive higher priority than those with primarily scientific or cultural interest. The integration of de-extinction efforts with broader conservation goals maximizes positive impact.
Proxy species selection represents a critical decision for each de-extinction project. The closest living relatives serve as genetic donors and surrogate mothers, but availability and conservation status of proxy species affects project feasibility. Endangered proxy species present ethical considerations similar to those addressed in elephant-mammoth relationships.
International collaboration opportunities vary among de-extinction candidates based on their historical range and current conservation interests. Some species like woolly mammoths have international significance and could benefit from global research partnerships, while others may be primarily of interest to specific regions or countries.
Timeline considerations reflect the complexity and resource requirements for different de-extinction projects. The dire wolf project required several years from initial research to live births, and more complex projects like mammoths may require longer development periods. Resource allocation must balance multiple concurrent projects while ensuring adequate attention to each species.
Technological advancement requirements differ among species based on their unique biological characteristics. Some projects may require developing new reproductive technologies, while others need advances in genetic analysis or species-specific care protocols. The dire wolf success provides a foundation, but continued innovation remains necessary.
The selection of future de-extinction targets involves balancing scientific feasibility, conservation impact, public interest, and resource availability. Projects that can build upon dire wolf technologies while addressing important conservation needs receive priority consideration for development.
Public engagement opportunities vary among different species based on their cultural significance and public recognition. Species with strong public awareness like mammoths and dodo birds may generate more support and funding than lesser-known but scientifically important candidates.
The dire wolf success creates momentum for expanding de-extinction efforts while establishing protocols and infrastructure that can be applied to other species. Each subsequent project benefits from lessons learned and technologies developed through previous efforts, creating increasing efficiency in de-extinction approaches.
As de-extinction technology continues advancing, the list of potential candidates may expand to include species previously considered impossible to restore. The boundaries of what’s achievable continue to expand with each technological breakthrough and successful species resurrection.
